A box is accelerating with acceleration `=20m//s^(2)`. A block of mas 10 kg placed inside the box and is in contact with the verticle wall as shown. The friction coefficient between the block and the wall is `mu=0.6` and take g=10 m//s^(2)`

Options

A. The acceleration of the block will be `20m//s^(2)`
B. The friction force acting on the block will be 100 N
C. The contact force between the verticle wall and the block will be `100 sqrt(5)` N
D. The contact force between the verticle wall and the block is only electromegnetic in nature

Answer

A, B, C, D

Explanation

N=10 a=200 N
`f_(max)=0.6xx200=120 N`
`mg=100 N lt f_(max)`
:. The friction is static and `f=100 N`
The contact force `=sqrt(N^(2)+f^(2))=100 sqrt(5)` N