Question
Question: A wedge of mass 2 m and a cube of mass m are shown in figure. Between cube and wedge, there is no fr...
A wedge of mass 2 m and a cube of mass m are shown in figure. Between cube and wedge, there is no friction. The minimum coefficient of friction between wedge and ground so that wedge does not move is –
A
0.10
B
0.20
C
0.25
D
0.50
Answer
0.20
Explanation
Solution
Net horizontal force on wedge
FH = mg cos q sin q
Net normal reaction from the ground = 2 mg + mg cos2 q
\ µN = FH
̃ µ = 0.20