Question Detail

PHY 101 Work, Energy and Power Objective Question
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Question

A small motor raises an 800 N load of bricks 10 m in 20 s. What is the minimum power needed?
Options
A 400 W
Correct Answer
B 8000 W
C 16000 W
D 40 W
Correct Answer

Option A is the correct answer.

Detailed Explanation

Power = work / time = (force × distance) / time = (800 N × 10 m) / 20 s = 8000 J / 20 s = 400 W.

Hint

Power = (weight × height) / time.

Question Info

Course: PHY 101
Topic: Work, Energy and Power
Type: Objective
Difficulty: Not specified
Question 420 of 1250
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