Question

Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 18.0 kg and the larger bottom crate has a mass of m2 = 94.0 kg. There is NO friction between the crate and the floor, but the coefficient of static friction between the two crates is μs = 0.8 and the coefficient of kinetic friction between the two crates is μk = 0.65. A massless rope is attached to the lower crate to pull it horizontally to the right (which should be considered the positive direction for this problem).



The tension is increased in the rope to 1213.0 N causing the boxes to accelerate faster and the top box to begin sliding. What is the acceleration of the upper crate?



5) As the upper crate slides, what is the acceleration of the lower crate?

Answer 1

And what is the question?

Answer 2

sorry i updated the question it got cut off

Answer 3

1213N - .65*18g = 94*a

Answer 4

what about for the accel of the upper crate?

Answer 5

.65*18g

Answer 6

.65*18g = 18a

Answer 7

ahh thank you!

Answer 8

i have a few more if your willing to help

Answer 9

sure

Answer 10

thank you i just posted it can u see it?