Question

if the mass of the block is increased the frictional force will increase or decrease . give reasons

Answer 1

if the mass of the block is increased the frictional force will increase because frictional force is directly dependent on mass. if block has more mass then more interlocking of irregularities present between the surface of block and the ground.

Answer 2

if mass of the block is increased the frictional force will increase because the mass of the block is directly proportional to the frictional force.