posted by blair .
A 2.00 kg aluminum block and a 5.20 kg copper block are connected by a light string over a frictionless pulley. They sit on a steel surface, where Î¸ = 28.0°.
Determine the sum of the magnitudes of the forces of friction acting on the blocks._____________N
I don't understand how to solve this question. Please help! Thanks.
I don't understand the question.