Question

Solve the following
1. A force always moves a stationary object. Do you agree? Give reason.

2. All non-contact forces attract other objects. True or false? Explain.

3. Why is rolling friction less than sliding friction?

4.Friction is a necessary evil. Justify the statement.​

Answer 1

Explanation:

2.False. Non contact force are those in which physical contact is not there.

3.The force of friction depends on the area of contact between the two surfaces. ... As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction.

4. Yes, Friction is necessary because due to friction walking is possible, two bodies stick together,brake works on the basis of friction.

1.a stationary object only moves under a resultant force. And if the forces applied can generate a resultant force, then yes, the object always moves.