Physics question? urgent help please!!

Posted on 2017-10-18 15:54:00 in Physics by KANDDY

1) In the figure provided, a 0.940 kg box sits on top of a 1.59 kg box. A rope connects the smaller box to a wall while another rope is pulling the larger box to the right with a tension force of 35.9 N. If the coefficient of kinetic friction at both the lower and upper surfaces of the larger box is μk = 0.540, what is the acceleration of the larger box? Assume the ropes are massless. 

2) In the figure provided, a 36.4° ramp in an airport has luggage sliding down to the owner. Suitcase A has a mass of 4.13 kg with a coefficient of friction of μk = 0.270 and another suitcase B has a mass of 12.6 kg with a coefficient of friction of μk = 0.140. If the ramp is 2.82 m long and the suitcase starts from rest, how much time will it take for suitcase A to reach its owner?

 

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