Question

The crane operator should swing the boom slowly enough to have _____. Otherwise, personal injury or equipment damage may result?

1) More control over the movement
2) Less control over the movement
3) Faster movement
4) No movement

Answer 1

The crane operator should swing the boom slowly to have more control over the movement, preventing injury or damage. Objects lifted by cranes start and end at rest due to controlled motions, similar to objects pushed across rough surfaces due to friction. Thus (option a) is right answer.

Step-by-step explanation:

The crane operator should swing the boom slowly enough to have more control over the movement. Otherwise, personal injury or equipment damage may result from sudden or uncontrolled movements. Thus (option a) is right answer.

When an object is lifted by a crane, it begins and ends its motion at rest because of the deliberate control exerted to ensure safety and accuracy. The same principle applies when an object is pushed across a rough surface; it begins at rest and, once the pushing force is removed, eventually comes to rest again due to friction.

The primary difference between these systems is the forces involved. In the case of the crane, the forces include gravity and those exerted by the crane's machinery to lift and move the load. When pushing an object across a surface, the primary forces are the applied force that moves the object and the frictional force that opposes this movement.