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A 10 cm cube of meatl is fastened rigidl...

A `10 cm` cube of meatl is fastened rigidly in place. A second, identical cube of metal is pulled across the top of the first cube at a constant speed by a constant `10 N` force, as shown. The frictional force between the cubes.

A

is less than `10N`.

B

is equal to `10 N`

C

is greater than `10 N`

D

cannot be determined without a detailed model of the two surface.

Text Solution

Verified by Experts

The correct Answer is:
B
`vec(V)=` constant `:. vec(a) = 0 :. sum vec(F)=10-f=0 rArr f=10N`
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