Question

Suppose we have block of 4 kilogram kept on a horizontal surface and we are applying a horizontal force of 10 newton. Let the coefficient of friction is 0.2. Find the force of friction. Assume that g = 10.

Options

• 4 newton

• 8 newton

• 1 newton

• None of these

Answer 1

4 newton

Explanation:

Force of friction = `mu  mg`

Where `mu` is the coefficient of static friction.

Given that, `mu` = 0.2, m = 4 kg and g = 10

∴ Force of friction = `0.2 xx 4 xx 10` = 8 N