Question

please answer with explanation ​

Answer 1

I think the friction will remain same since the surface of contact affect friction over a not it's speed

Answer 2

Explanation:

◆ Answer-

F2 = 20 N

◆ Explanation-

# Given-

v1 = 2 m/s

v2 = 4 m/s

F1 = 10 N

# Solution-

As we know, frictional force depends on the velocity of the moving object.

i.e. F ∝ v

Thus, here-

F1/v1 = F2/v2

F2 = F1 × v2 / v1

F2 = 10 × 4 / 2

F2 = 20 N

Therefore, frictional force is 20 N.

Hope it helps