Tag: physics

Questions Related to physics

Fill in the blanks:

The________ force is the force exerted by a surface on an object when it moves across it or make an effort to move across it.

physics along with motion what forces can do? force and it's unit force and its effects

  1. magnetic

  2. friction

  3. gravitational

  4. electrostatic

Show answer
Correct Option: B
Explanation:

Frictional force acts between two surfaces to oppose the relative motion between the surfaces. It acts on the body moving across it or trying to move across it.

Fill in the blanks:
The force of friction arises due to contact between surfaces. It is an example of _________ force

physics along with motion what forces can do? force and it's unit force and its effects

  1. non-contact force

  2. muscular force

  3. contact force

  4. gravitational force

Show answer
Correct Option: C
Explanation:

Friction is a force that is exerted by a surface on an object that is moving on the surface. So, it is a contact force.

Why does a boat, in still water, come to rest if we stop rowing it?

physics along with motion what forces can do? force and it's unit force and its effects

  1. Due to non-contact force

  2. Due to force of friction

  3. Due to muscular force

  4. Due to magnetic force

Show answer
Correct Option: B
Explanation:

It is the force of friction between the surface of water and the boat that brings the boat to rest once we stop rowing.

What brings the rolling ball to rest?

physics along with motion what forces can do? force and it's unit force and its effects

  1. Force of friction

  2. Gravitational force

  3. Electrostatic force

  4. Magnetic force

Show answer
Correct Option: A
Explanation:

It is the force of friction between the surface of the ball and the ground that bring the rolling ball to rest.

Which of the following cases represent that a force can change the shape of an object?

physics along with motion what forces can do? force and it's unit force and its effects

  1. A man trying to stop a sliding car.

  2. A weight put at the centre of a metal scale placed between two bricks.

  3. Two girls pulling each other.

  4. A man pulling a cow with a rope around his neck.

Show answer
Correct Option: B
Explanation:

A weight put at the center of a metal scale placed between two bricks will bend the scale from the middle.

A spring is compressed when a force is applied. This is an example of

physics along with motion what forces can do? force and it's unit force and its effects

  1. force changing the shape of an object

  2. force changing the motion of an object

  3. force breaking a rigid object

  4. none of these

Show answer
Correct Option: A
Explanation:

A spring gets compressed by the application of a force. This is an example of force changing the shape of an object.

Other than changing the state of motion of an object, force

physics along with motion what forces can do? force and it's unit force and its effects

  1. can change the shape of an object

  2. has no other effect

  3. can change the colour of an object

  4. can change the state of rest of an object

Show answer
Correct Option: A
Explanation:

Effects of force on an object are
(i) to change the state of motion of the object
(ii) to change the shape and size of the object

If a force changes the shape of a body, the body should be

physics along with motion what forces can do? force and it's unit force and its effects

  1. non-rigid

  2. rigid

  3. fluid only

  4. none of these

Show answer
Correct Option: A
Explanation:

When a force is applied on a non-rigid body, its shape changes.

Mark the incorrect statement(s)

physics along with motion what forces can do? force and it's unit force and its effects

  1. Length of a rubber band increases,when a stretching force is applied

  2. A spring shortens in length on the application of a compressive force

  3. Gold on hammering flattens to form a thin leaf

  4. None of above 

Show answer
Correct Option: D
Explanation:

Force can also bring change in dimensions and all the above options are its examples.

In the game of cricket,the stumps fall when the ball strikes them.This is an example of

physics along with motion what forces can do? force and it's unit force and its effects

  1. Contact force

  2. Non contact force

  3. Displacement force

  4. None

Show answer
Correct Option: A
Explanation:

The contact forces represent the result of physical contact between two objects ,one by which force is exerted and the other on which force is exerted.