Contact Forces

Q.

What are different types of forces?

Q. Muscular force and frictional force are forces.

1. constant
2. non-constant
3. weak nuclear

Q. Statement 1: Frictional force can act between surfaces even when they are not in contact.

Statement 2: Friction is a contact force.

1. Both the statements are true.
2. Both the statements are false.
3. Statement 2 is true but statement 1 is false.
4. Statement 1 is true but statement 2 is false.

Q.

Muscular force is different from contact force.

1. True

2. False

Q. Explain with four examples that sometimes, force of friction is desirable.

Q.

Force of ___________ is caused only when the surfaces of two bodies are in contact with each other

Q.

Give one word for the following.

1. A force acting on an object by directly touching it

Q.

The statement given below is incorrect. Write the correct statements.

Force of friction always acts in the direction of applied force.

Q.

A force that is called to play, when a given force acts on a body is called

1. consequential force

2. secondary force

3. resultant force

4. none of these

Q. State whether statement is true or false.

The force of friction always acts against the motion.

1. False
2. True

Q.

Which of the following is/are non-contact force(s)?

1. Gravitational Force

2. Electrostatic Force

3. Muscular Force

4. Magnetic Force

1. 1, 3 and 4

2. 1 and 3

3. 1, 2 and 4

4. All of the above

Q.

What is a contact force? Give some examples of it and explain why they are contact forces?

Q.

Which of the following are contact forces?

1. Muscular force
2. Electrostatic force
3. Frictional force
4. Gravitational force

1. 1, 3, and 4

2. 1 and 3

3. 2, 3 and 4

4. All of the above

Q.

What is a contact force? Give some examples of it and explain why they are contact forces? [2 Marks]

Q. Which among the following are contact forces?

1. Muscular force
2. Electrostatic force
3. Frictional force
4. Gravitational force

1. 2, 3 and 4

2. All of the above

3. 1 and 3

4. 1, 3, and 4

Q.

Friction is a force which opposes relative motion between two surfaces in contact with each other.

1. False

2. True

Q.

Interaction of one object with another object results in a force between them.

1. True

2. False

Q. Which of the following is an example of contact force?

1. Magnetic force
2. Muscular force
3. Electrostatic force
4. Gravitational force

Q.

What is a contact force?

1. Forces that need to be in contact with object for their effect.

2. Forces that do not need to be in contact with object for their effect.

3. Both A and B depending on the force.

4. Forces that are in contact with the ground.

Q.

If a body is pushed along a surface, it comes to rest after travelling some distance. The force which is responsible for stopping the motion of the body here is called ___