Miracle S4 Phy Thu 5:30 pm by Gregory Wong

Miracle S4 Phy Thu 5:30 pm by Gregory Wong https://padlet.com/gregorywong/esn05hvay6mm Post your working here en-us 2018-11-22 09:53:47 UTC 2021-06-03 11:19:37 UTC hello@padlet.com 1a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582095644 The gradient of the velocity time graph is the acceleration of the athlete and the graph shows a constant gradient which means a constant acceleration.]]> 2021-06-03 09:47:13 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582095644 1a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582095815 The gradient of the speed time graph show a constant increase for the first 2s so the acceleration is uniform]]> 2021-06-03 09:47:24 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582095815 1a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582096346 constant increasing gradient]]> 2021-06-03 09:47:52 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582096346 1b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582096789 .5x9x2=9m]]> 2021-06-03 09:48:11 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582096789 1A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097551 The gradient of the speed time graph, which is equal to the acceleration, constantly increases]]> 2021-06-03 09:48:51 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097551 1b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097663 Dist travelled=1/2x9.0x2.0
= 9.0m
]]> 2021-06-03 09:48:57 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097663 1b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097798 0.5(2)(9)=9m]]> 2021-06-03 09:49:07 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582097798 1B https://padlet.com/gregorywong/esn05hvay6mm/wish/1582098828 0.5x2x9=9m]]> 2021-06-03 09:49:59 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582098828 3a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582103581 constant rate of change of displacement ]]> 2021-06-03 09:54:01 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582103581 3a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104043 constant velocity means that there is no acceleration]]> 2021-06-03 09:54:25 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104043 1a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104198 the graph shows a constant increasing velocity as the gradient is increasing constantly. Thus, this shows that the acceleration is constant]]> 2021-06-03 09:54:33 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104198 3b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104683 d=st
=47x168
=7896m
7896xsin24=3200m(shown)]]> 2021-06-03 09:55:00 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582104683 3A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582105156 The speed and the direction of the man does not change]]> 2021-06-03 09:55:28 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582105156 3a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582105779 constant velocity means that there is no acceleration and the rate of change in displacement is constant.]]> 2021-06-03 09:56:05 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582105779 3b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582106455 AB= 47x(2.8x60)
=7896
h= 7896xsin24
=3200m (shown)

]]> 2021-06-03 09:56:38 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582106455 1b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582107024 dist = area under graph
= (0.5)(2)(9)
= 9m]]> 2021-06-03 09:57:03 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582107024 3b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582108107 2.8min=168seconds
47(168)=7896
ab=7896
h=(sin 24)(7896)
=3200m

]]> 2021-06-03 09:58:10 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582108107 3a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582108564 constant velocity means there is no resultant force acting on the object, thus, the rate of change of displacement is constant]]> 2021-06-03 09:58:36 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582108564 3ci https://padlet.com/gregorywong/esn05hvay6mm/wish/1582109105 mgh=3200(10)(85)
=2720000J]]> 2021-06-03 09:59:04 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582109105 3b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582109969 d= (speed)(time)
= (47)(2.8)(60)
=7896
7896(sin24) = 3211.6m (5sf)
= 3200m (3sf) (shown)]]> 2021-06-03 09:59:46 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582109969 3cii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582111145 W=Fd
F=W/d
=2720000-(0.5x85x47^2)/3200
=820N]]> 2021-06-03 10:00:42 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582111145 3B https://padlet.com/gregorywong/esn05hvay6mm/wish/1582111449 47x(2.8x60)=7896
h=7896xsin24=3200]]> 2021-06-03 10:01:01 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582111449 3ci https://padlet.com/gregorywong/esn05hvay6mm/wish/1582113498 Ep=mgh
=85(10)(3200)
=2720000J]]> 2021-06-03 10:02:57 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582113498 3ci https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115294 GPE = mgh
= (85)(10)(3200)
= 2720000J
thus, decrease in GPE = 2720000-0
= 2720000]]> 2021-06-03 10:04:41 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115294 3C https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115528 85x10x3200=2720000

1/2x85x47^2=93882.5

F=W/d
=2720000-93882.5/3200
=820N

]]> 2021-06-03 10:04:54 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115528 3ci https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115643 mgh=85x10x3200
= 2.72x10^6J]]> 2021-06-03 10:04:59 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582115643 3cii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582116010 F=W/d
=2720000-(0.5x85x47^2)/3200
=820N

3d)

]]> 2021-06-03 10:05:20 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582116010 4a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582116197 (380x1000)x(6.1x106-40
=232N]]> 2021-06-03 10:05:30 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582116197 3cii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582117636 ke=1/2x85x47^2
=93882.5
F=W/d
=(2.72x10^6-93882.5)/3200
=820N (3sf)]]> 2021-06-03 10:06:43 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582117636 3cii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582117900 let force = s
W=sd
2720000 - (0.5)(85)(47^2) = s(3200)

s = 820.66N (5sf)
= 821N (3sf)]]> 2021-06-03 10:06:57 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582117900 4b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582119615 it was a slight vacuum in the pump]]> 2021-06-03 10:08:32 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582119615 4a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582119691 f=pa
=(380000)(6.1(10^-4))
=232N(3sf)]]> 2021-06-03 10:08:34 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582119691 4A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582121010 P=F/A
(380x1000)=F/(6.1x10^-4)
F=232N]]> 2021-06-03 10:09:50 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582121010 4a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582121932 p=F/a
F=pa
=(380x10^3)(6.1x10^-4)
=232N (3sf)]]> 2021-06-03 10:10:42 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582121932 11a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582122387 Q=It
t=10/0.5
=20s

]]> 2021-06-03 10:11:06 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582122387 4a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582122786 P=F/A
380 000 = F/(6.1)(10^-4)
F = 232N (3sf)]]> 2021-06-03 10:11:22 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582122786 11b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582123444 0.5x3=1.5A]]> 2021-06-03 10:11:57 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582123444 4b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582124472 There was vacuum in the pump]]> 2021-06-03 10:13:02 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582124472 11c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582124474 the effective resistance increases. Hence since V=RI, with the same emf, the current would decrease hence current flowing A2 decreases]]> 2021-06-03 10:13:02 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582124474 4b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582125678 there are space for the air to go into the tyre, thus, less effort is needed for the student to push the pump, thus, less force is needed]]> 2021-06-03 10:13:54 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582125678 4b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582125884 there is trapped air in the tyre which helps to make the piston move a larger distance]]> 2021-06-03 10:14:06 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582125884 11a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582126092 Q=It
t=10/0.5
=20s]]> 2021-06-03 10:14:19 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582126092 4B https://padlet.com/gregorywong/esn05hvay6mm/wish/1582126416 There is a vaccum in the tyre??]]> 2021-06-03 10:14:41 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582126416 9a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582127195 1.2x10^-6m]]> 2021-06-03 10:15:25 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582127195 9b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582128244 infra red ]]> 2021-06-03 10:16:14 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582128244 11a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582130781 Q=It
10=0.5t
t=20s]]> 2021-06-03 10:18:53 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582130781 11b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132095 0.5(3)
1.5A]]> 2021-06-03 10:19:49 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132095 9c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132300 V=f入
f=(3x10^8)/91.2x10^-6)
=2.5x10^14Hz]]> 2021-06-03 10:19:55 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132300 11b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132449 0.5(3)=1.5A]]> 2021-06-03 10:20:05 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582132449 13ai https://padlet.com/gregorywong/esn05hvay6mm/wish/1582133633 P=IV
=24x3.3
=79.2W]]> 2021-06-03 10:21:24 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582133633 13aii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582134108 E=IVt
=79.2x10
=792J]]> 2021-06-03 10:21:55 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582134108 13 b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582134885 A,C,BD,E,F]]> 2021-06-03 10:22:41 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582134885 11A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135229 10/1/2=20s]]> 2021-06-03 10:23:02 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135229 11a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135453 Q=It
t=10/0.5
=20s]]> 2021-06-03 10:23:15 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135453 11B https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135544 2021-06-03 10:23:21 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135544 11c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135940 when the switch is opened, effective resistance increases and the emf remains constant. Thus using the formula V=RI, the current will decrease resulting in the amount of current flowing through A2 to decrease.]]> 2021-06-03 10:23:45 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582135940 11c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582136158 As the switch is opened, if forms an open circuit an thus current cannot flow through ammeter 1. since the reading of ammeter 1 is now 0A, the current flowing through ammeter 2 decreases as the total current of an parallel circuit is divided equally among each circuit.]]> 2021-06-03 10:23:59 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582136158 11C https://padlet.com/gregorywong/esn05hvay6mm/wish/1582136495 The effective resistance increases while the voltage stays constant. This causes the total cuurent , and thus the current flowing through A2 to decrease..]]> 2021-06-03 10:24:18 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582136495 11b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582137507 I= 0.5x3
=1.5A]]> 2021-06-03 10:25:13 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582137507 11c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139306 As the switch is open, the effective resistance increases. The e.m.f does not change. So when V=IR, as the V is constant and R increases, I flowing through A2 decreases]]> 2021-06-03 10:26:50 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139306 9A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139319 1.2x10^-6m]]> 2021-06-03 10:26:51 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139319 9B https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139937 infrared]]> 2021-06-03 10:27:30 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582139937 3d https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140088 P1V1=P2V2]]> 2021-06-03 10:27:40 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140088 9a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140408 1.2(10^-6) m]]> 2021-06-03 10:28:02 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140408 9a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140962 1.2(10^-6) m]]> 2021-06-03 10:28:38 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582140962 9b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582141250 infrared]]> 2021-06-03 10:28:56 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582141250 9c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582141649 v=f(landa)
(3.0)(10^8) = f(1.20)(10^-6)
f = (2.5)(10^14) Hz]]> 2021-06-03 10:29:20 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582141649 9C https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142446 V=FrequencyxWavelength
3x10⁸=Fx91.2x10^-6
=2.5x10¹⁴Hz]]> 2021-06-03 10:30:09 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142446 9a https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142880 1.2x10^-6 m]]> 2021-06-03 10:30:36 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142880 9b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142951 infra red]]> 2021-06-03 10:30:40 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582142951 9c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582143382 f=(3)(10^8)/91.2(10^-6)
=2.5(10^14) Hz]]> 2021-06-03 10:31:06 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582143382 9b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582143921 infrared radiation]]> 2021-06-03 10:31:40 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582143921 13ai https://padlet.com/gregorywong/esn05hvay6mm/wish/1582144758 P=VI
= (24)(3.3)
= 79.2W]]> 2021-06-03 10:32:23 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582144758 9c https://padlet.com/gregorywong/esn05hvay6mm/wish/1582144920 v=f(landa)
f=3x10^8/1.2x10^-6
=2.5x10^14 Hz]]> 2021-06-03 10:32:34 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582144920 13aii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582145577 E = Pt
= (79.2)(10)
792J]]> 2021-06-03 10:33:17 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582145577 13b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582146438 A C B D E F ]]> 2021-06-03 10:34:12 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582146438 13ai https://padlet.com/gregorywong/esn05hvay6mm/wish/1582146532 P=VI
=24(3.3)
=79.2W]]> 2021-06-03 10:34:18 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582146532 13ai https://padlet.com/gregorywong/esn05hvay6mm/wish/1582154398 P=IV
=24x3.3
=79.2W ]]> 2021-06-03 10:41:34 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582154398 13aii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582156805 E=Pt
=79.2(10)
=792J]]> 2021-06-03 10:43:48 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582156805 13aii https://padlet.com/gregorywong/esn05hvay6mm/wish/1582157217 E=Pt
=79.2x10
=792J]]> 2021-06-03 10:44:13 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582157217 13A https://padlet.com/gregorywong/esn05hvay6mm/wish/1582157838 P=IV= 24X3.4=79.2w

E=PT=79.2X10=792j

]]> 2021-06-03 10:44:48 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582157838 13b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582158139 A,C,B,D,E,F]]> 2021-06-03 10:45:06 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582158139 13b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582158507 A, C, B, D, E, F]]> 2021-06-03 10:45:28 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582158507 13b https://padlet.com/gregorywong/esn05hvay6mm/wish/1582161474 ACBDEF]]> 2021-06-03 10:48:36 UTC https://padlet.com/gregorywong/esn05hvay6mm/wish/1582161474