https://padlet.com/o_pawlowski1/68ajz260c985hwnc en-us 2020-04-22 21:24:01 UTC 2024-05-19 07:16:54 UTC hello@padlet.com o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/524234731 2020-04-22 21:25:57 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/524234731 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/524286377 2020-04-22 22:04:59 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/524286377 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526320998 2020-04-23 16:39:54 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526320998 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526328207 I used a tomato can from the grocery store and used the mass that was on the label already which was 170g = 0.17kg]]> 2020-04-23 16:42:33 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526328207 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526334360 Using a ruler I measured the height (8.1 cm) from bottom to top where the can was at rest.]]> 2020-04-23 16:44:44 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526334360 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526344628 Using a ruler I measured the length (3.6 cm) of the side of the can from top to bottom.]]> 2020-04-23 16:48:29 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526344628 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526347023 I used a ruler to measure out of the radius of the can and got 2.7 cm.]]> 2020-04-23 16:49:24 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526347023 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526593373 Showing free body diagram for a solid cylinder down an inclined plane]]> 2020-04-23 18:21:10 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526593373 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526890272 2020-04-23 20:45:43 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526890272 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526953459 2020-04-23 21:27:21 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526953459 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526953741 2020-04-23 21:27:35 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526953741 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526960493 2020-04-23 21:32:28 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526960493 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526995346 2020-04-23 21:57:56 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526995346 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526996105 2020-04-23 21:58:34 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526996105 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526997324 2020-04-23 21:59:42 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/526997324 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527019243 In order to find velocity of the cylinder rolling down, I combined the Big ugly equation and Rotational Kinetic Energy.]]> 2020-04-23 22:18:55 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527019243 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527044305 2020-04-23 22:43:16 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527044305 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527051052 2020-04-23 22:49:25 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527051052 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527074990 2020-04-23 23:12:10 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527074990 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527096875 2020-04-23 23:33:39 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527096875 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527107139 2020-04-23 23:43:17 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/527107139 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/528540507 While solving for the initial velocity I used my energy skills and used the Big Ugly equation to solve for it.]]> 2020-04-24 14:44:44 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/528540507 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/528545190 While solving in the beginning I substituted equations such as the Newtons 2nd Law for rotation in order to come up with the equation for radial acceleration. Also I used the forces in the diagram and solved each x-direction and y-direction for the sum of the forces which for radial is  ΣF=ma_r or a_cm .]]> 2020-04-24 14:46:21 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/528545190 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529029391 Since I knew that the cylinder was at rest to begin with, it's safe to assume that any initial velocity here is 0 m/s, with that I used the radial acceleration equation since I've solved for it already and rearranged it to solve for final angular velocity.]]> 2020-04-24 18:02:45 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529029391 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529072967 2020-04-24 18:24:39 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529072967 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529080794 After solving for final angular velocity (ω_f = 6.47 rad/s) , I used the 1st angular kinematics equation to solve for time, with my known variables  ω_{i ,}  ω_{f ,} α .]]> 2020-04-24 18:29:01 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529080794 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529096245 After solving for the time, I used the variables I had and used the 3rd angular kinematics equation to solve for the angular displacement (θ= 0.5 rad). ]]> 2020-04-24 18:36:46 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/529096245 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537034096 This is Such a GREAT start. If you use Big Ugly instead of conservation of energy for that calculation, you'll get 40 more points!]]> 2020-04-28 17:06:59 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537034096 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537041270 You can also use this for Using Big Ugly (I decided to count it for you because it's so obvious - but usually I want people to label it). ]]> 2020-04-28 17:09:16 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537041270 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537045963 There are so many calculations you can do with this - just take a look at all the rotational stuff plus the momentum energy stuff and find random things to calculate (I see rotational inertia, rotational KE, KE trans, angular speed...so many!)]]> 2020-04-28 17:10:50 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537045963 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537055129 You use that static friction is equal to mu*normal but that's not the case. See the Physics Ninja video for extra help with this. It might have cancelled in the end but you still need to be able to solve this without making that possibly incorrect assumption :)]]> 2020-04-28 17:13:44 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537055129 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537066966 This was so close! But the units were wrong. Fix the units on angle and you've got the points for the next draft. ]]> 2020-04-28 17:17:30 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537066966 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537069882 Make sure you show where the equation come from that friction equals Ia/r stuff. Add that in the beginning and it'll count!]]> 2020-04-28 17:18:34 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537069882 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537074252 Oops! I just noticed that you're using radial acceleration in the angular kinematics "alpha" slot. That's not going to work. Oh man! I'm bummed because that affects your theta and other stuff below it...]]> 2020-04-28 17:20:07 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/537074252 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543247648 2020-04-30 23:55:30 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543247648 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543308029 2020-05-01 01:03:17 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543308029 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543309349 2020-05-01 01:04:36 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543309349 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543310374 2020-05-01 01:05:57 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543310374 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543316829 2020-05-01 01:13:51 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543316829 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543333821 2020-05-01 01:34:03 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543333821 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543338207 I used tangent to find the horizontal part of the ramp, since I knew the angle and the height of the ramp already.]]> 2020-05-01 01:39:02 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/543338207 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544197969 2020-05-01 14:53:22 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544197969 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544199607 2020-05-01 14:54:05 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544199607 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544219604 I used the equation Work done by torque equals torque times the angular displacement in order to solve for the work.]]> 2020-05-01 15:02:24 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544219604 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544308775 2020-05-01 15:40:18 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544308775 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544341533 2020-05-01 15:54:21 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544341533 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544378820 2020-05-01 16:10:10 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544378820 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544399951 2020-05-01 16:19:31 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544399951 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544409665 2020-05-01 16:23:55 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/544409665 rgraessl https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/553565473 I didn't expect anybody to sweep the angular motion/rotation unit but you sure did!!!!]]> 2020-05-06 01:27:03 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/553565473 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571280474 ~6 pts +30 pts]]> 2020-05-13 21:39:49 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571280474 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571283445 2020-05-13 21:41:59 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571283445 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571365306 Since I knew 3 variables already the final velocity, horizontal displacement, and acceleration I used the kinematics 1d equation 2 to solve for initial velocity.]]> 2020-05-13 22:51:57 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571365306 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571434160 I combined the big ugly equation and the thermodynamics equation to solve for the final temperature of the ice cube when it comes to rest, and earlier to solve for the work of the friction I used that for my Q since I knew that 50% of the energy dissipated by friction is absorbed. I also solved for final temperature by using the Q= mcT equation from the thermodynamics skills unit.]]> 2020-05-13 23:58:59 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571434160 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571469915 In the above photos I solved for initial velocity using the Big ugly equation and also using kinemtics equation and I got the same answer for both.]]> 2020-05-14 00:33:19 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571469915 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571485897 2020-05-14 00:48:22 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571485897 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571486814 2020-05-14 00:49:17 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571486814 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571498874 In this scenario there is the object floating in the water that is applying a force onto the ground which is the gravity force and the ground is also applying a force back onto the object which is keeping it up and floating the buoyant force.]]> 2020-05-14 01:01:30 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571498874 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571504237 In this scenario there is a ice cube that is applying force onto the ground with the force of gravity and the ground is applying force back onto the object with the normal force this shows Newton's 3rd Law that for every action there is an equal and opposite reaction.]]> 2020-05-14 01:06:27 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571504237 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571533384 2020-05-14 01:34:52 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571533384 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571534994 2020-05-14 01:36:32 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571534994 o_pawlowski1 https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571538454 In this scenario there is the cylindrical object that is at rest and acting on the ground due to the force of gravity (which is at an angle due to the ramp and gives the force of gravity mass times gravity constant multiplied by cosine theta) , and the ground is acting upon the object as well giving the normal force therefore creating an equal and opposite reaction proving newton's 3rd law.]]> 2020-05-14 01:40:08 UTC https://padlet.com/o_pawlowski1/68ajz260c985hwnc/wish/571538454