Chapter 10, Problem 11A

If the string that holds a whirling can in its circular path breaks, what causes the can to move in a straight-line path—centripetal force, centrifugal force, or a lack of force? What law of physics supports your answer?

To determine

The cause of the straight path followed by a whirling can when the string breaks.

Explanation of Solution

Introduction:

Newton’s first law of motion states that a body in state of rest stays at rest or in motion till an external force is applied. This property of any body is called as its inertia.

If the string holding the can, breaks, the can follows a straight path because no force acts on the can. Due to this lack of force, the can moves in the direction of the velocity which is always tangential to the circular path. The motion of the can is determined by Newton’s first law.

Conclusion:

The can follows a straight path because of lack of force. The motion of the can is determined by Newton’s first law.