Changes in Motion and Force Unit Review

The illustration shows the forces in Newtons (N) acting on each group. Which direction will the groups move under these conditions?

• To the right 2N

• To the left 2N

• To the right 22N

• To the left 10N

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Three people can move a piano easier than two people. This demonstrates which of Newton's Laws of Motion?

• Newton's 1st Law (Inertia)

• Newton's 2nd Law (F= m x a)

• Newton's 3rd Law (Action Forces & Reaction Forces)

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The illustration shows all the forces in Newtons (N) acting on a box. The sum of all the forces acting on the truck results in a force acting on the truck

• to the right with a strength of 40 Newtons.

• to the left with a strength of 40 Newtons.

• to the right with a strength of 60 Newtons.

• to the left with a strength of 60 Newtons

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Which of the following graphs shows how the mass of an object affects the amount of force needed to move it?

• B

• A

• C

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The illustration below shows a cart with different amounts of force being applied. What is the net force on the cart and in which direction is it?

• 5 N to the right

• 5 N to the left

• 8 N to the right

• 3 N to the left

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What conclusion can be made about the forces acting on the teeter totter?

• Balanced

• Equal 400 N

• Will shift to the left

• Will shift to the right

A diagram of forces being applied to a box by four people is illustrated below. If the net force acting on the box is 10 N to the right, what is the magnitude of the force applied by the boy pulling to the left?

• 14N

• 21N

• 19N

• 11N

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The illustration shows all the forces in Newtons (N) acting on a box. The sum of all the forces acting on the box results in a force acting on the box.

• to the right with a strength of 11 Newtons.

• to the left with a strength of 7 Newtons.

• to the left with a strength of 6 Newtons.

• to the right with a strength of 4 Newtons.

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Which Law of Motion says that force equals mass times acceleration?

• Newton's 2nd law

• Newton's 3rd law

• Newton's 1st law

For every action force, there is a reaction force equal in strength opposite in direction.

• Newton's 3rd law

• Newton's 4th law

• Newton's 2nd law

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