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Understanding Power in Physics

Understanding Power in Physics

Assessment

Interactive Video

Physics

9th - 10th Grade

Practice Problem

Hard

Created by

Jennifer Brown

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the definition of power in physics?

The speed at which an object moves

The amount of energy stored in an object

A rate of change of energy over time

A measure of force applied over distance

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is power measured in physics?

In watts

In joules

In newtons

In meters per second

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a 60-watt light bulb indicate?

It has a lifespan of 60 hours

It uses 60 joules of energy per minute

It uses 60 joules of energy per second

It emits 60 lumens of light

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much energy does a 60-watt light bulb use in 8 hours?

172,800,000 joules

172,800 joules

1,728,000 joules

17,280 joules

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of energy is involved when a car accelerates from rest?

Potential energy

Thermal energy

Kinetic energy

Chemical energy

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much power does a car engine use if it accelerates a 1000 kg car to 20 m/s in 4 seconds?

5,000 watts

500,000 watts

50,000 watts

500 watts

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the power required to lift a 100 kg crate at 5 m/s using the energy over time method?

4,900 watts

490 watts

490,000 watts

49 watts

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