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AP Physics C: Mechanics 3.5.A: Power

Practise AP Physics C: Mechanics 3.5.A Power by calculating energy-transfer time from motor power, work and gravitational potential-energy changes.

Syllabus
Effective Fall 2024
Course
AP Physics C: Mechanics

Exam points

  • Calculate lift time from motor power by combining gravitational work mgh with P = W/t.

3.5.A—Describe the transfer of energy into, out of, or within a system in terms of power. TOPIC 4.1 Linear Momentum question 1

[Maximum number: 1]

An electrical motor provides 0.50 W of mechanical power. How much time will it take the motor to lift a 0.1 kg mass at constant speed from the floor to a shelf 2.0 m above the floor?

A

0.25 s

B

0.40 s

C

1.0 s

D

2.0 s

E

4.0 s

Figure for Question 3.5.A—Describe the transfer of energy into, out of, or within a system in terms of power. TOPIC 4.1 Linear Momentum question 1 — AP Physics C: Mechanics
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