Question

a man standing in an elevator that is moving with a constant acceleration holds a 3-kg block B between two other blocks in such a way that the motion of B relative to A and C is impending. Knowing that the coefficients of friction between all surfaces are \mu\,=.30 and \mu\,=.25​

Answer 1

Answer:

man standing in an elevator that is moving with a constant acceleration holds a 3-kg block B between two other blocks in such a way that the motion of B relative to A and C is impending. Knowing that the coefficients of friction between all surfaces are \mu\,=.30 and \mu\,=.25 , determine (a) the acceleration of the elevator if it is moving upward and each of the forces exerted by the man on blocks A and C has a horizontal component equal to twice the weight of B, (b) the horizontal components of the forces exerted by the man on blocks A and C if the acceleration of the elevator is 2.0 m/s^2 downward.

Any help would be greatly appreciated. I'm at a total loss with this problem. part (a)= 1.962 m/s^2 part (b)=39.1