Question Detail

PHY 101 Work, Energy and Power Objective Question
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Question

What is the formula for instantaneous power in terms of force and velocity?
Options
A P = F v
B P = F·v = F v cos θ
Correct Answer
C P = F / v
D P = F t
Correct Answer

Option B is the correct answer.

Detailed Explanation

Instantaneous power is given by the dot product of force and velocity vectors: P = dW/dt = F·(dr/dt) = F·v = F v cos θ, where θ is the angle between the force and velocity.

Hint

It's the rate at which the force does work at a specific instant.

Question Info

Course: PHY 101
Topic: Work, Energy and Power
Type: Objective
Difficulty: Not specified
Question 414 of 1250
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