Frictional and Normal Force

Q.

A moving ball on the ground comes to a stop after some time because of ___.

1. speed

2. friction

3. motion

4. magnetism

Q. A force exerted by our muscles is called __________ force.

1. magnetic
2. muscular
3. gravitational
4. frictional

Q.

Automobiles tires have generally irregular projections over their surfaces? Why?

Q.

Friction is increased if

1. an oil is sprayed

2. the surfaces are made wet

3. the surfaces are made dry

4. the surfaces are polished

Q. On water slides, we move faster as there is _____.

1. less frictional force

2. more frictional force

3. less magnetic force
4. more magnetic force

Q.

What happens to the friction when there is water on the concrete surface?

1. Reduces
2. Increases
3. Cannot be Determined
4. Doesn't change

Q.

Walking on the floor would be ___ without friction.

1. very simple

2. possible

3. impossible

4. easy

Q.

A moving ball on the ground comes to a stop after some time because of ______.

1. speed

2. friction

3. motion

4. magnetism

Q.

What will happen if you press your hand against a concrete wall?

1. Wall changes shape

2. Wall breaks

3. Wall starts to move

4. Nothing happens to the wall

Q. Which of the following is unsafe to do during a train journey?

1. Avoiding talking to strangers
2. Using underground bridges to cross tracks
3. Avoiding going inside tunnels
4. Jumping in or out of train

Q.

In the rainy season, oil or grease is spread on the slippery ground to increase friction and prevent vehicles from skidding.

1. True
2. False

Q.

We move faster on water slides as there is less ____.

1. gravity

2. friction

3. mass

4. weight

Q.

People slide faster on ice rinks, due to:

1. More friction

2. Less friction

3. More gravity

4. Less gravity

Q.

We don't go through the ground we stand on it because of this force. Name this force.

1. Magnetic Force

2. Wind Force

3. Electric Force

4. Normal Force

Q.

Walking on the floor would be ___ without friction.

1. impossible

2. possible

3. easy

4. very simple

Q.

Friction is a type of ____ force.

1. Non-contact

2. Contact

3. Nuclear

4. Spring

Q.

The normal forces we apply every day are examples of ______ forces.

1. magnetic
2. gravitational
3. contact

4. non-contact