Force and Motion March 24

A book sitting on a desk has....

• Balanced forces acting on it

• Unbalanced forces acting on it

• No forces acting on it

• All forces acting on it

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If a ball and a piece of paper are dropped from the same height they will

• Hit the ground at the same time because of gravity

• Hit the ground at different times because of gravity

• Hit the ground at different times because of friction

• Hit the ground at different times because of air resistance

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What can make an object start moving, stop moving or change direction?

• Gravity

• Work

• Force

• Inertia

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4 balls are thrown with the same amount of force. Which ball will go further?

• 100kg

• 250kg

• 500kg

• 750kg

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The tendency of an object to stay at rest or stay in motion is called

• Friction

• Newton

• Force

• Inertia

The ________ the mass of the object, the _______ the force required to move or stop the object.

• Greater; Greater

• Smaller; Greater

• Greater; Smaller

• Smaller; Smaller

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Your mom is driving you in a car that is going 60mph. She slams on the brakes! Why does your body go forward?

• Inertia

• Force

• Gravity

• Motion

A football player kicks a ball into the air. It falls to the ground, rolls then stops. What two forces cause the ball to stop?

• Gravity and Friction

• Force and Friction

• Force and Motion

• Force and Gravity

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Newton's first law of motion states:

• A force acting on an object will change the object's velocity by causing it to speed up, slow down, or change directions.

• A body in motion tends to remain in motion, a body at rest tend to remain at rest unless acted on by an outside force.

• For every force and action, there is an equal and opposite reaction.

Newton's third law of motion states:

• For every force and action, there is an equal and opposite reaction.

• A body in motion tends to remain in motion, a body at rest tend to remain at rest unless acted on by an outside force.

• A force acting on an object will change the object's velocity by causing it to speed up, slow down, or change directions.

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