Newton's Laws

30 mph west is an example of ____________.

A lamp sitting on a table is demonstrating Newton's ____ law.

• 2nd

• 3rd

• Acceleration

• 1st

A rollercoaster heading down a hill is ____________.

• accelerating

• moving at a constant velocity

• moving at a constant momentum

• at rest

Answer explanation

Acceleration has a speed and direction. Even if you are moving at a constant speed, if you change direction you are accelerating.

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Newton's 3rd law states that for every ​ force.

• action, reaction

• reaction , action

• speed, velocity

• acceleration, velocity

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A car traveling at 65 mph is an example of its _____.

• direction

• speed

• distance

• velocity

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A force that causes an object to slow down when it touches another object is_​ (a)   .

Newton's 2nd law says that acceleration of an object depends on its applied for and ______________.

• acceleration

• gravity

• speed

• mass

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If an object stays still or continues moving at the same speed and in the same direction, it is a _______________ force.

Net force is a combination of all _________ acting on an object.

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What will be the effect on the boy in the picture if the driver stops quickly?

• Because of inertia he will remain in the same position

• He will be pushed back into the car seat.

• He will move from one side of the car seat to the other

• He will move forward pressing against the seatbelt,

Answer explanation

The body of the boy has inertia. It will continue moving until it is acted on by an unbalanced force - the seatbelt.

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