Question

The net force acting on the 15 kg block is equal to.

• A. The weight of the 5 kg block.
• B. The tension in the string.
• C. The difference between the weight of the 15 kg block and the 5 kg block.
• D. The sum of the weight of the 15 kg block and the 5 kg block.
• E. The weight of the 15 kg block.

Answer 1

Answer: (B)

The tension in the string.

The weight of the 15 kg block and the normal force the table exerts on the block are equal and opposite, so the only force that can accelerate the 15 kg block is the tension in the string.