1 A block of mass m = 4.50 kg rides on top of a second block of mass M = 15.

m4.50M15.00.390

(a) What maximum force can be exerted on the string without causing the 4.50 kg block to slip?

m14.50m27.30

1. (a) Find the acceleration of the two objects and the tension in the string. A m/s^2? T?

m1m2μkg

1.19  102

θ140.0θ250.0T1 =  N? T2 =  N ?T3 =  N? 

442.5

(a) What weight does the scale read if the elevator accelerates upward at 2.10 m/s2?

2.102