Question

In the given figure the co-efficient of friction between 2 kg and 3 kg blocks is 0.2 and between 3 kg and ground is 0.1. Choose the correct statements:

• A. Minimum value of F for which 3 kg can move is 10 N.
• B. When force is 4N, static friction at all the surfaces is 4 N.
• C. Maximum acceleration of 2 kg is 1 $m/s^2$.
• D. Slipping between 2 kg and 3 kg blocks starts when F > 15 N.

Answer 1

The correct option is D Slipping between 2 kg and 3 kg blocks starts when F > 15 N.


$F_{min}=5N$
Maximum acceleration of 2kg$=\frac{4}{2}=2m/s^2$
Maximum force at which they will move together is
F-5=5(2)
F=15N