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QUESTION 1 (a)MATERIAL C. Based on the results, the distance traveled by block C is the furthest compared to other blocks and the frictional force acting between the block with material c and the surface of the ramp is the least.

(b) Material B. The block traveled on the surface with B traveled the least distance which means that the amount of frictional force acting between the block and the surface of the ground is the most,thus, the person would not slip and fall off the bath tub when he/she steps on the bath mat.
question 2 (a)As the mass of the load increases, the extension of spring P increases.

Q2(b)Spring p. The amount of elastic spring force acting on the boy was more than spring Q than in spring P. Thus spring P would extend more and would allow the trampoline to be more elastic, so the trampoline  would be bouncier.

benefits of using spring q: When  a heavier person plays the trampoline, spring q would not break easily compared to spring P as it extends lesser.
2.The trampoline would be safer to play with and would not be dangerous to play when it extends so much that it launches the person playing it into the air.
Question 3. when the ball was thrown to the other person, it went down as there is gravitational force acting on the ball pulling it down which would make the ball fall down.

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a) when the ball was in the air, it was pulled down by gravity

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Darren & Joel
there gravitational force acting on the ball as it go goes up ,it comes back down.

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There is Gravitational force acting on the ball, which makes the ball go down, as there is a curve in the ball's path.

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hi

The ball was falling
i

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a

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Question 1
(a)Material C. It traveled the longest distance, thus the smoother the surface the lesser the friction between the object and the ground letting it travel the furthest, hence it is the smoothest material.
(b)Material B. It raveled the least, thus it has the most amount of friction between it and the ground, hence it is suitable for making a bath mat.

Question 2
(a)As the mass of the load increases, the extension of spring P also increases.
(b)Spring P.

Question 3
(a)Gravitational force is acting on the ball as the ball drops after a while.

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a

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a)The heavier the load, the longer the extension of the spring.
b)

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Q2-a) The greater the mass of the load, the greater the extension of spring P
Q2-b) Spring P. It extended more when a mass of 50 kg was placed on it compared to spring Q, showing that it has more elastic force.Thus, it is more suitable to be used for the spring in the trampoline.

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Q1)
(a)material C.The block travelled the furthest distance on material c so it  is the smoothest indicating that there was the least amount of friction between material c and the block.
(b) material B. material b has travelled the least amount of distance. Therefore, there was the most amount of friction between material b and the block so that the person will not slip when showering.
Q2)
(a) As the mass of the load increases, the extension of Spring P also increases.
(b) Spring P. Spring P has more elastic spring force than spring Q as when when the same amount of load hung,p extended more than Q. So when the person jumps, he can jump higher
Extra qn
If we choose spring Q, it is safer for the person who is jumping so they will not injure themselves when jumping easily.
Q3)
(a) Gravitational force as the

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b) B. With the same amount of force, it moved the least thus it means there is more friction and people would not slip easily and injure themselves.

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b) B. With the same amount of force, it moved the least thus it means there is more friction and people would not slip easily and injure themselves.

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b) B. With the same amount of force, it moved the least thus it means there is more friction and people would not slip easily and injure themselves.

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QUESTION 1: a) Material C. Box traveled the most distance on C even thought here was same amount of force was applied on the block.
b) Material B as the block traveled least distance on surface B. Bath mat is used to increase friction between the person's feet and surface of bath mat, preventing person from slipping and falling.
q2a
As weight of load increases, the extension of spring increases.
b) Spring P. As the extension of spring p is more than Q, when someone jumps the fabric,it stretches the most with more potential energy before it releases it n propels the kid upward more.
spring q benefit is that it is safer as the kid jumping on it will not be able to jump higher.

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Q1-a) Material C. The smoothest  surface will have the least friction, which means that the block will travel the furthest distance. It travelled the furthest distance on material C.

Q1-b) Material B. It has the most amount of friction as the block travelled the least distance on it.

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Question 1:
(a) Material C is the smoothest as the block traveled the furthest so there is the least friction between the block and the surface of material C.
(b) Material B. There will be more friction between the person's feet and the bath mat, so the person stepping on the bath mat will not slip and fall.

Question 2:
(a) As the mass of the load increases, the length of the extension of spring P increases.
(b) Spring P. Spring P can extend more than spring Q so when people jump on the trampoline, they are able to jump higher.

Benefits of using spring Q:
_The person will not get injured easily
-The fabric will not tear easily

Question 3:
The ball moved down as gravity was acting on it.

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Q1
a) Material C.Material C allowed the block to travel the furthest as It had the least friction between the block and the surface of the material, hence allowing it to travel the furthest once it comes down from the slope.
b) Material B. Material B allowed the block to travel the least distance,  there was the most friction between the block and the material. Therefore, material B would be the most suitable to be made into bath mat to prevent people from slipping.
Q2
a) As the mass of the load increases, the extension of spring P increases.
b) Spring P. It extends more than Q when it is stretched, so people can be able to jump higher on the trampoline.
Bonus:
Benefit 1: It would be safer for the user to prevent injuries.
Benefit 2: The fabric and spring will not break easily for heavier loads.
Q3
a) The ball travelled up and forwards when boy A threw the ball to boy B and travelled back down because of gravity and air resistance

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Question 1:
a) Material C. With the same amount of force used, it traveled the furthest, which means there is the least amount of frictional force between the block and the material.

b) B. With the same amount of force, the block moved the least which means there is the most friction thus people would not slip easily on the mat and injure themselves easily.
Question 2:
a)The heavier the load, the longer the extension of the spring.
b) Spring P. Spring P can extend more so when people jump on the trampoline, they can jump higher

Benefits of using spring Q :
1) So that it is safer for the person using the trampoline as he does not jump too high and off the trampoline.
2) So that a person will not jump too high and break the faberic unlike the spring P which may jump too high and break the fabric.

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q1a
material C as it traveled the furthest as there is less friction
q1b
B as the the wooden block traveled the least on surface B,it has more friction in between the feet and surface b therefore it allows a person to have a grip on it and will not fall

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Question 1:
(a) Material C. If the material is the smoothest,it will travel the most distance and based on the results, material C travelled the most distance. Thus, material C has the smoothest surface.
(b) Material B. The bath mat should reduce friction to prevent the person in the bath tub to slip and fall, so it has to a rough material. Since material B travelled the least distance, so it is the roughest material among the other materials.

Question 2:
(a)As the mass of the load increases, the extension of spring P also increases.
(b) Spring P. As the mass of the load increases, the extension of the spring should increase more, so that the trampoline would be bouncier. Since spring P extended more when both springs P and Q were the same mass, spring P is more suitable to be used as the spring in the trampoline.
Benefits using spring Q:
- it can last longer
- it will be safer
- when a heavy person jumps on it, the fabric will not break as easily

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Which spring (P or Q) is more suitable to be used as the spring in the trampoline? Explain your answer. (1m)

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A boy was jumping on a trampoline. A trampoline is made of a fabric attached by springs to a metal frame.

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What is the relationship between the mass of the load and the extension of spring P? (1m)

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The graph below shows the length of 2 different springs (P and Q) when different loads were hung on it.

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The diagram below shows a bath mat used in a bath tub.

(b) Based on the information provided above, which material is most suitable to be made into a bath mat? Give a reason for your answer. (2m)

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Which material has the smoothest surface? Explain your answer based on the obtained results and concept of forces.  (1m)

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David conducted an experiment to find out how the different surfaces will affect the distance travelled by the block as shown in the diagram.  He pushed the box from the starting point with the same amount of force over material A, B, C and D and recorded the distance travelled by the box.