Question

For Problems 1-3
Block B rests on a smooth surface. The coefficient of static friction between A and B is u = 0.4. When F = 30 N, then


1.) Acceleration of upper block is
a. 3/2 ms=2
b. 6/7 ms-2
250 N
c. 4/3 ms-2
d. 3/7 ms 2


2. Acceleration of lower block is
Fig. 7.326
a. 3/7 ms-2
b. 4/3 ms-2
c. 6/7 ms 2
d. 3/2 ms-2


3. When F = 250 N, acceleration of lower block is
a. 415 ms-2
b. 3/2 ms-2
c. 3/5 ms-2
d. 8/5 ms-2
​

Answer 1

Answer:

1ans in green image.

2.answer

415 ms -2

3 ans in grey image it's very easy diagram and correct ans is when u draw the the diagram then right this {8/5ms-2}