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Block A weight 4N and block B weight 8N ...

Block A weight `4N` and block B weight `8N` The coefficient of kinetic friction is `0.25` for all surface. Find F to slide B at constant speed when

A is held at rest

A

`2 N`

B

`3 N`

C

`4 N`

D

`5 N`

Text Solution

Verified by Experts

The correct Answer is:
b

`f_(t_1) = 0.25xx 4 = 1 N, f_(t_2) = 0.25 xx(4 +8) = 3 N`
`F = f_(l_2)= 3 N` for constant velocity
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