Science Chapter 2: Forces and Motion

Besides strength, or magnitude, what does every force have?

• gravity

• direction

• friction

• magnetism

A ball is rolled across four different surfaces with the same force. Which surface will slow the movement of the ball the most?

• tile floor

• paved road

• grassy field

• cement sidewalk

How do electric and magnetic forces act on different objects?

• They only pull objects

• They only push objects

• They either push or pull objects

• They only push or pull objects when they touch each other

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What happens when an object accelerates?

• Its speed or direction changes

• Only its speed changes

• Only its direction changes

• Its speed and direction do not change

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When you ride a roller coaster what makes your body rise out of its seat at the top of the hill?

• inertia

• gravity

• friction

• electricity

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Complete the sentence

The greater the net force acting on an object ,

• the lesser the mass of an object

• the greater the mass of an object

• the lesser the acceleration of the object

• the greater the acceleration of the object

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What always happens when the forces acting on an object are equal in strength and opposite in direction?

• The object moves

• The motion of the object does not change

• The object does not move

• The object becomes heavier

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When the sun is low in the sky early in the morning, trees form

• no shadows

• short shadows

• long shadows

• all sizes of shadows

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An area of partial darkness where light has been blocked by an object is a(n)

• gravity

• shadow

• friction

• acceleration

The tendency of an object to resist any change in motion is

• friction

• non contact force

• acceleration

• inertia