Question 1

What do you need to do to a triangular weight to get it to slide down a ramp?

Accepted Answer

Making the ramp steeper reduces the friction.

Answer

Making the ramp wider reduces the friction.

Answer

Making the ramp heavier reduces the friction.

Answer

Making the ramp flatter reduces the friction.

Question 2

Friction is created:

Accepted Answer

whenever things rub on each other.

Answer

whenever things fall.

Answer

whenever things break.

Answer

whenever things blow up.

Question 3

Which of the following statements regarding friction is correct?

Accepted Answer

There is less friction between the floor and a rolling bowling ball than there is between the floor and a sliding bowling ball.

Answer

There is less friction between the floor and a square bowling ball than there is between the floor and a round bowling ball.

Answer

A square bowling ball will travel the same distance as a round bowling ball if the force exerted on each is the same.

Answer

There is no friction between the smooth bowling ball and the smooth floor.

Question 4

Which of the following statements correctly describes the role that friction plays in the motion of a train?

Accepted Answer

All of the above.

Answer

Friction is necessary to make a train stop.

Answer

Friction is necessary for traction as the train starts moving.

Answer

Friction is necessary to keep the train on the tract as it is moving.

Question 5

Crickets make sounds by:

Accepted Answer

rubbing their wings together.

Answer

<P>talking.</P>

Answer

<P>clapping.</P>

Answer

jumping around

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