Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

A car of mass 1200 kg accelerates from rest to a speed of 25 m/s in a time of 8.0 s. What is the average power produced?
Options
A 7.10 kW
B 4.43 kW
C 47.00 kW
Correct Answer
D 7.67 kW
Correct Answer

Option C is the correct answer.

Detailed Explanation

The work done equals the change in kinetic energy: KE_final = ½ * 1200 kg * (25 m/s)² = 600 * 625 = 375,000 J. Average power = Work / time = 375,000 J / 8.0 s = 46,875 W = 46.875 kW ≈ 47.00 kW.

Hint

Average power is the total work done (which equals the change in kinetic energy) divided by the total time.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1166 of 1250
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