Question

A block of mass 5 kg resting on a horizontal surface is connected by a cord, passing over a light frictionless pulley to a hanging block of mass 5 kg. The coefficient of kinetic friction between the block and the surface is 0.5. Tension in the cord is:

• A. 49 N
• B. Zero
• C. 36.75 N
• D. 2.45 N

Hint:

When calculating tension in a system with friction, account for the frictional force opposing motion.

Answer 1

The Correct Option is A

The forces on both blocks must be analyzed, and the frictional force is included in the calculation. Using Newton's second law, the tension in the cord is found to be 49 N.
Final Answer: \[ \boxed{49 \, \text{N}} \]