Question

16. A block is sitting on a ramp tilted from horizontal. The block is just about to slide. T he angle of the ramp relative to horizontal is 14 degrees. What is the coefficient of friction between the block and the ramp? a. 0.25 b. 0.97 c. 0.5 d. 0.1 e. 0.34

Answer 1

Answer:

option A

Explanation:

given,

angle of inclination = 14°

block is resting on the inclined plane.

Let m be the mass of the block

vertical component of forces

∑F_y = 0

N_r - mg cos θ = 0

N_r = m g cos θ.............(1)

along the plane of slide

f_r = μ N_r

μ N_r = mg sin θ............(2)

dividing equation (2)/(1)

μ = tan 14°

μ = 0.25

correct answer is option A