Rolling Friction

Q.

Wheels are added to trolleys for smooth movement. What is the principle behind this?

1. Sliding friction is less than rolling friction

2. Sliding friction is more than rolling friction

3. Both sliding friction and rolling friction are the same
4. There is no comparison between sliding friction and rolling friction.

Q.

It is easier to drag a wheel than to roll it.

1. True

2. False

Q.

Since rolling friction is less than sliding friction, sliding friction is replaced with rolling friction in most machines using ball bearings.

1. False

2. True

Q. A ball rolling on the ground slows down after a while due to friction between the surface of the ball and the ground.

1. True
2. False

Q. What is the function of rollers in skating shoes?

1. They utilize rolling friction.
2. They make the shoes look beautiful.
3. They make the shoes last longer.
4. They reduce rolling friction.

Q. Pick the odd one out for the given types of friction.

1. 3
2. 1
3. 2
4. 4

Q. Identify the correct statement.

1. Sliding friction and rolling friction depends on the type of surface
2. Sliding friction is less than rolling friction
3. None of the above
4. Rolling friction is less than sliding friction

Q.

It is easier to drag a wheel than to roll it.

1. False

2. True

Q.

When static, sliding and rolling frictional forces are to be arranged in an increasing order, which one of the following options would be correct?

1. Rolling friction < Sliding friction < Static friction

2. Static friction < Sliding friction < Rolling friction

3. Sliding friction < Static friction < Rolling friction

4. Rolling friction < Static friction < Sliding friction

Q.

Wheels are added to trolleys for smooth travel. What is the principle behind this?

1. Both sliding friction and rolling friction are the same
2. There is no comparison between sliding friction and rolling friction.

3. Sliding friction is less than rolling friction

4. Sliding friction is more than rolling friction