Question

a block of mass 4 Kg is placed on a rough horizontal plane. A time dependent horizontal force f=2t acts on the block the frictional force between the block and the plane at time T =2s is​

Answer 1

Answer:

Explanation:

It will be 4 newton because for a block to be at rest on a plane the external force should be equal to the frictional force.

So at time T = 2 seconds if you calculate the external force

f=2T=2(2)=4N

So the frictional force will also be 4 newton and if the block is about to start the motion then we can call this frictional value as limiting frictional value

Thank you