Question

10.
A block is placed over a plank. The coefficient of friction between the block and the plank is u=0.2
· Initially, both are at rest, Suddenly, the plank starts moving with acceleration ao = 4 m/s . The
displacement of the block in 1 s is (g = 10 m/s
(a) 1 m relative to ground
(b) 1 m relative to plank
(C) zero relative to plank
(d) 2 m relative to ground
In the fiy shown all the strings are massless and friction is absent everywhere. Choose the correct
11.​

Answer 1

Explanation:

option B

1 relative to plank