First slide

Friction

Question

Two masses A and B of 5 kg and 6 kg respectively are Connected by a string passing over a frictionless pulley fixed at the corner of table as shown in the figure. The coefficient of friction between A and the table is 0.3. Find the minimum mass of C (in kg) that must be placed on A to prevent it from moving (Take g = 10 m/s²).

Moderate

Solution

$\begin{array}{l} T = 60 N \\ T = μN (To prevent A from moving) \\ T = μ (50 + 10 m) \\ \Rightarrow μ (50 + 10 m) = 60 \\ \Rightarrow 50 + 10 m = \frac{60}{0 .3} = 200 \\ \Rightarrow m = 15 kg \end{array}$

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