Question

4. i) Friction produces heat when two surfaces moving relatively in opposite
direction
ii) Friction produces heat when two surfaces moving relatively in same direction
[ ]
A) (i) is correct
B) (ii) is correct
C) both (i) and (ii) are correct
D) both (i) and (ii) are wrong
ans plzz ​

Answer 1

Answer:

C)both (i) and (ii) are correct

Explanation:

1)The heat produced is due to the friction force. In order to move against each other, they have to overcome the force of friction. The work done by the moving parts against the frictional forces between their surfaces appears as heat.

2)The heat produced is due to the friction force. In order to move against each other, they have to overcome the force of friction. The work done by the moving parts against the frictional forces between their surfaces appears as heat.