Question

click on the pic

In the figure shown, the coefficient of static friction
between the block A of mass 20 kg and horizontal
table is 0.2. What should be the minimum mass of
hanging block just beyond which blocks start moving?
20 kg
A
p = 0.2
B
0
(1) 3 kg
(2) 2 kg
(3) 4 kg
(4) 5 kg

need ans with solution !​

Answer 1

Answer:

4kg

Explanation:

n=200

frictional force =0.2*200=40n

so 4kg block will provide 40n tesion on string