A bucket of cement is raised by a rope at constant speed at a construction site. The upward force on the bucket supplied by the rope is
A)greater than the force of gravity.
B)equal to the force of gravity.
C)less than the force of gravity.

Question

Quizplus · Accepted Answer

According to Newton's third law, the force of the bucket pulling down due to gravity is equal in magnitude and opposite in direction to the force of the rope pulling up on the bucket. Therefore, the upward force on the bucket supplied by the rope is equal to the force of gravity.

A Bucket of Cement Is Raised by a Rope at Constant