Changes in Motion and Force Unit Review

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

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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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NGSS.HS-PS2-1

______ is speed in a given direction.

• velocity

• speed

• reference frame

• kinetic energy

What is a change in velocity?

• acceleration

• force energy

• speed

• Newton's 4th law

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When forces are not balanced, the object is in _______

• motion

• resting

• speed

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In what direction with the box move?

• right

• left

• up

• down

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What is the net force acting on the box?

• 5N

• 25N

• 15N

• 0N

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There is a book sitting at rest on a chair. Which of the following is true?

• There are many forces acting on the book, but they balance each other out

• The book exerts no force on the chair

• The chair exerts no force on the book

• all of these

If you increase the mass on an object, its acceleration

• decreases

• stays the same

• also increases

• stops

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