Question Detail

PHY 101 Work, Energy and Power Objective Question
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Question

A force F pulls a block a distance s at an angle θ to the horizontal. What is the correct expression for the work done?
Options
A W = F s
B W = F s sin θ
C W = F s cos θ
Correct Answer
D W = F s tan θ
Correct Answer

Option C is the correct answer.

Detailed Explanation

When a force is applied at an angle, only the component parallel to the displacement does work. This component is F cos θ, so the work done is W = (F cos θ) × s = F s cos θ.

Hint

Use the component of force in the direction of motion.

Question Info

Course: PHY 101
Topic: Work, Energy and Power
Type: Objective
Difficulty: Not specified
Question 380 of 1250
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