Which of the following surfaces will the ball take less time to stop?

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which ball will take least time to stop on the surface given above?

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following situations will show more friction?

• A man sitting on the floor.

• A man walking on the road.

• A man sliding on the ice.

• A man rolling on the gym.

Why did the ball take less time in the towel compare to the floor?

• Because the towel is smoother than the floor.

• Because the floor has more friction than the towel.

• Because the towel has more friction than the towel.

• Because the floor has larger area than the towel.

Which of the following is NOT a non-contact force?

• Frictional force

• Magnetic force

• Gravitational force

• electrostatic force

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NGSS.MS-PS2-3

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What type of force can be observed in this picture?

• frictional force

• magnetic force

• gravitational force

• electrostatic force

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NGSS.MS-PS2-4

Which of the following statements is NOT true?

• Force of gravity pulls the object towards Earth.

• If an object moves downwards, it slows down.

• If an object moves upwards, it is moving against the gravity.

• A book and a pen will drop off the ground at the same time.

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NGSS.MS-PS2-4

Why do you think space crafts are able to move up into space without falling back?

• Because it is heavier than the gravity.

• Because it has wings to fly.

• Because it has a machine that moves with a rapid speed.

• Because the ground pushes it upwards.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What will be the operation in getting the net force if both forces coming from different direction?

• multiplication

• division

• addition

• subtraction

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NGSS.MS-PS2-2

What will be the net force acting on a box if two boys are both trying to push it to the left? Boy A has 10 N and Boy B has 15 N.

• 5 N

• - 5 N

• 25 N

• 150 N

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NGSS.MS-PS2-2