Gravitational and Frictional Force IV

Which of these has the tendency to change the state of motion of an object?

• Acceleration

• Force

• Mass

• Weight

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Which type of friction is evident on a ball thrown upward?

• Air Friction

• Rolling Friction

• Sliding Friction

• Static Friction

Which of the following shows rolling friction?

• swimming

• flying a kite

• playing on a slide

• pushing a supermarket cart

Which of the following shows an object in motion?

• A book on top of table

• A car that is parked on a lot

• A child running around a tree

• A dog that is resting under a tree

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NGSS.K-PS2-1

When you push a ball in the same direction it is rolling, what will happen to the ball?

• it will slow down

• It will move faster

• it will continue to move

• It will slow down then move fast again

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You push a cart and it does not move. The force you applied is _____________ the force of friction acting on the cart.

• less than

• more than

• equal to or less than

• almost the same with

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NGSS.MS-PS2-1

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If you push a cart and it moves. The friction force is _______ your applied force.

• less than

• more than

• equal to

• equal to or more than

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NGSS.MS-PS2-1

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If you want to maintain the motion of a moving object, the force needed is ____________.

• zero

• equal to the kinetic friction

• less than the kinetic friction

• more than the kinetic friction

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What causes your hair to stand after being rubbed against a balloon?

• friction

• gravity

• heat

• static electricity

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Which of the following shows an object experiencing gravitational force?

I. A car rolling down a hill

II. Falling leaves from a tree

III. Tears falling from the eyes

• I

• II

• III

• I, II, and III

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