Question

a 3.5 kg book is sliding on a desk. The coefficient of kinetic friction between surfaces is 0.2.What is the size of the force of friction?

Answer 1

The formula for the force of Kinetic friction is:

`F_(k) =`μ*N

Please consider μ as the coefficient of the kinetic friction = 0.2
N = Normal to the desk = m*g = 3.5 * 9.8 = 34.3 N

`F_(k) =` Force of Kinetic Friction = ?

Therefore,
The force of Kinetic Friction =
`F_(k) =` 0.2 * 34.3

`F_(k) =`6.86N

The size of force of Kinetic Friction = 6.86N.