Question 1

Which of the following statements about friction is TRUE?

Accepted Answer

Friction opposes motion of objects.

Answer

Friction occurs between non-rubbing surfaces.

Answer

Friction acts in a direction similar to the direction of an object’s motion.

Answer

Friction causes moving objects to move faster.

Question 2

Will it be easier for a person to push a table on a carpeted floor than on tiled floor?

Accepted Answer

No, because the carpeted floor is rough, so friction is greater.

Answer

Yes, because the carpeted floor is smooth, so friction is greater.

Answer

No, because the carpeted floor is rough, so friction is lesser.

Answer

Yes, because the carpeted floor is smooth, so friction is lesser.

Question 3

When can we say that friction on a floor is greater?

Accepted Answer

If the floor is rough.

Answer

If the floor is tiled.

Answer

If the floor is smooth.

Answer

If the floor is wet.

Question 4

Which force causes a rolling ball to stop after a few seconds?

Accepted Answer

friction

Answer

magnetic

Answer

gravity

Answer

motion

Question 5

Why is difficult to move heavy objects on a rough surface?

Accepted Answer

there is greater friction on a rough surface

Answer

there is no friction on a rough surface

Answer

there is lesser friction on a rough surface

Answer

rough surface is slippery

Question 6

When you are travelling along a road, how does the wet road affect friction?

Accepted Answer

It decreases friction.

Answer

It maintains friction.

Answer

It increases and decreases friction.

Answer

It increases friction.

Question 7

Which of the following forces cause objects to slow down and eventually stop?

Accepted Answer

friction

Answer

air resistance

Answer

gravity

Answer

magnetic

Question 8

What is the direction of friction between a moving object and a surface?

Accepted Answer

opposite to the direction of object’s motion

Answer

toward the direction of object’s motion

Answer

perpendicular to the direction of object’s motion

Answer

similar to the direction of object’s motion

Question 9

Which activity below needs the least friction?

Accepted Answer

skating

Answer

climbing

Answer

grinding

Answer

writing

Question 10

Which activity is a way of reducing friction?

Accepted Answer

applying lubricant

Answer

removing wheels on heavy cabinets

Answer

putting spikes on tires

Answer

using rubber shoes

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