Force and Motion Review

To make an object move you must first apply ---

• an opposing force

• an unbalanced force

• a stationary force

• a vertical force

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NGSS.MS-PS2-2

a force is best defined as ---

• the application of weight

• a push or pull that is exerted on matter

• the flow of electric charges

• a bond in which electrons are shared

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A student pushes against a wall with 20 N of force and the wall does not move. In this situation, the wall exerts --

• 0 N of force

• less than 20 N of force

• 20 N of force

• more than 20 N of force

Which change would require more force to pull the wooden block up the ramp?

• Have the student use two hands

• Reduce the mass of the wooden block.

• Restack the books so the thinnest book is on the bottom.

• Glue sandpaper to the surface of the ramp.

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Oliver stepped onto a three-car subway train with standing room only. What caused him to fall backward into other riders when the train suddenly moved forward?

• He was riding in the last car of the train.

• He had heat exhaustion from the overcrowded train.

• Oliver's body resisted a change in the subway train's inertia.

• Oliver's body was responding to the force of gravity.

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NGSS.MS-PS2-1

Which law of motion predicts that a moving hockey puck will continue to move in the same direction at the same speed unless acted upon by another force?

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Newton's Law of Universal Gravitation

Which law explains the relationship among mass, force and acceleration?

• Universal Law of Gavitation

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

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NGSS.MS-PS2-2

The force of an object, with a certain mass accelerating at a certain rate, can be determined by using the equation below.

force = mass x acceleration

Which object would have the greatest force?

• A 5 kg object accelerating at 10 m/s

• A 5 kg object accelerating at 20 m/s

• a 20 kg object accelerating at 4 m/s

• a 20 kg object accelerating at 3 m/s

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Which of these would be different for an object if measured on the Earth and on the Moon?

• Mass

• Weight

• Volume

• Density

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NGSS.MS-PS2-4

The diagram below show the forces acting on a soccer ball.

In which of the diagrams will the ball remain motionless?

• W

• X

• Y

• Z

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