A heavy block at rest is suspended by a vertical rope.When the block is accelerated upward by the rope,the rope tension
A)is less than its weight.
B)equals its weight.
C)is greater than its weight.

Question

Quizplus · Accepted Answer

According to Newton's second law, the net force on an object is equal to its mass multiplied by its acceleration (F=ma). In this case, the block is being accelerated upwards by the rope. Therefore, the net force on the block is upwards. This net force is provided by the tension in the rope. As the tension in the rope is greater than the weight of the block (which is the force pulling it downwards), the answer is C, that the tension is greater than its weight.

A Heavy Block at Rest Is Suspended by a Vertical