Physics

Problem

Two blocks

P

(

4\,\text{kg}

) and

Q

(

1\,\text{kg}

) are kept in contact on a horizontal surface where the coefficient of kinetic friction is

0.20

. A force of

25\,\text{N}

is applied horizontally to

Q

toward the right and the blocks move together. Take

g = 10\,\text{m\,s}^{-2}

. Determine the magnitude of the contact force acting between

P

and

Q

during the motion.