First slide

Friction on horizontal surface

Question

Figure shows two blocks A and B pushed against the wall with the force F. The wall is smooth but the surfaces in contact of A and B are rough. Which of the following is true for the system of blocks to be at rest against wall?

Moderate

A

F should be equal to weight of A and B
B

F should be less than weight of A and B
C

F should be more than weight of A and B
D

System cannot be in equilibrium (at rest).

Solution

For system A and B together there is no upward force to balance the weight ( $m_{A} + m_{B}$ ) g. So, system can never be in equilibrium.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App