Forces and Motion Science

In the case of a car crash, the body’s inertia will continue to carry it to the right. However, if the person is wearing a seatbelt, in which direction will this force act?

• to the right

• to the left

• upward

• downward

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Once in orbit, the space shuttle used very little, if any, rocket power to maintain its speed despite traveling over 15,000 mph! How were NASA engineers able to do this?

• More mass equals more acceleration

• The space shuttle was able to use a special coating in order to achieve its fast speed in space.

• Gravity provides the necessary force to keep the space shuttle traveling at a high rate of speed.

• More force at liftoff equals more acceleration

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A ball at the top of a hill has ________ ________ because if pushed it will roll down the hill.

• Mechanical Force

• Unbalanced Energy

• Potential Energy

• Unbalanced Force

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Standing in line is an example of a ________ ________ since you are not moving forward, backward, or sideways.

• negative acceleration

• balanced force

• unbalanced force

• 1st law of motion

Which is newtons 2nd law

• Acceleration is a change in speed

• Acceleration is a change in action

• Acceleration is a change in name

• Acceleration is a change in velocity

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What are the appropriate units to describe acceleration?

• m/p

• m/h

• m/s

• m/s square

Students drew the forces acting on a skateboard. The skateboard is currently rolling to the right on a level path at a constant speed. What is a possible magnitude for Force A?

• 100 N

• 200 N

• 0 N

• 50 N

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Miss Green has one student pull a wagon and then a second student starts to push it from behind, but the speed does not change. What is the dependent (outcome) variable in this experiment?

• The speed of the wagon

• The amount of applied force

• The amount of net force

• The number of forces acting on the wagon

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Jacob holds a magnet with the north pole out near a magnet suspended on a string. The magnet on a string spins until the south pole is facing his magnet. Why did the magnet turn direction?

• The like poles are attracted to each other from gravity

• The like poles are attracted to each other from magnetic force

• The unlike poles are attracted because of gravity

• The unlike poles are attracted because of magnetic force

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What is the unit of force in the International System of Units (SI)?

• Newton

• Joule

• Watt

• Pascal

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