Science Motion

At what point on a roller coaster does the train have the highest kinetic energy?

• at the bottom of the first drop
  

• at the top of the second hill
  

• when the train first leaves the loading station 

• at the top of the first drop 

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Samuel kicks a soccer ball across a grassy field and it eventually comes to a stop. If Newton’s law of inertia is true, why did the ball stop? 

• Newton’s law only applies to objects at rest. 

• The mass of the ball is not great enough to have inertia. 

• Friction with the grass applies a net force on the ball causing it to decrease its speed. 

• Gravity slowed the ball until it came to a stop. 

Which is newtons 3rd law

• for every thing there is reaction

• for every reaction there is a unusual action

• For every reaction there is an equal and opposite reaction

• for every reaction there is an good action

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Which type of force(s) will cause a change in an object's motion?

• gravity

• balanced forces

• unbalanced force

• net force

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Newton's third law states that any action will have a(n) _______ and ______ reaction

• equal and same

• equal and opposite

• equal and equal to

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The tendency of objects to resist a change in motion is called:

• Friction

• Inertia

• Gravity

• Velocity

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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Suppose you pull Nick, who is standing on a skateboard, using a rope at a constant acceleration. What happens when you double the mass and add a friend?

• There will be no change to the required amount of force.

• The amount of force required is slightly increased.

• The amount of force required is doubled.

• The amount of force required is four-times as great.

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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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When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

• Balanced

• Magnetic

• Spring

• Unbalanced

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