Question Detail

PHY 101 Work, Energy and Power Objective Question
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Question

If the net work done on an object is positive, what happens to its speed?
Options
A The speed increases.
Correct Answer
B The speed decreases.
C The speed remains constant.
D The speed becomes zero.
Correct Answer

Option A is the correct answer.

Detailed Explanation

According to the work-energy theorem, positive net work (W_net > 0) results in a positive change in kinetic energy (ΔKE > 0). Since kinetic energy is ½mv², an increase in KE means the speed of the object increases.

Hint

Relate the sign of work to the change in kinetic energy and thus to speed.

Question Info

Course: PHY 101
Topic: Work, Energy and Power
Type: Objective
Difficulty: Not specified
Question 782 of 1250
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