Question

A vehicle is moving on a road with an acceleration=20 m/s^2. The frictional coefficient between the block of mass m and the vehicle so that the block does not fall downward is?

Answer 1

As the mass not fallen down so, the net force will be zero.
We know,
fr = mg
F = R
Fr = μR
and μ is frictional coefficient
fr = mg
μR = mg
μma = mg
μ = g/a
μ = 10/20
μ = 0.5

Answer 2

Answer:

0.5

Explanation: i hope it will clear your doubt