Question

1. Force can also be measured in kilogram force.
2. Force of friction imparts speed to a body.
3. For every force to act, the bodies should be in contact with each other.
4. Frictional force helps in burning a matchstick.
5. The jar of a mixer becomes hot when operated for some time due to the
frictional forces between the various parts of the machinery.
6. Force of friction increases the efficiency of a machine.
D.
Correct the false
7. Static friction is the maximum value of frictional force, before a body
starts to move.
8. Force can change mass of a body.
9. Friction is the force that resists movement between two objects.​

Answer 1

Answer:

1 true

2. true

3. false

4. true

5.true

6.false

7.true

8.false, force can never change mass or say mass of obj. is constant

9.true

Explanation:

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