# Unit 5 Concept Quiz

Quiz by Nicholas Weiss, updated more than 1 year ago
 Created by Nicholas Weiss about 6 years ago
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1

### Description

A conceptual review of work, energy, and power

## Resource summary

### Question 1

Question
An object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high it gains _____.
• Four times as much potential energy
• Twice as much potential energy
• Half as much potential energy
• Neither of these

### Question 2

Question
Car A has a mass of 1000kg and a speed of 30km/hr. Car B has a mass of 500kg and a speed of 60km/hr. What is true about their kinetic energies?
• Car A's KE is twice Car B's KE
• Car A's KE is equal to Car B's KE
• Car A's KE is half of Car B's KE
• Car A's KE is four times as muhc as Car B's KE

### Question 3

Question
Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.
• The same distance as the slower arrow
• Twice as far as the slower arrow
• Four times as far as the slower arrow
• More than four times as far as the slower arrow

### Question 4

Question
Which of the following is not a unit for power?
• Joule per second
• Watt
• Newton-second
• HorsePower

### Question 5

Question
An object that has gravitational potential energy has this energy because of its _____.
• Speed
• Acceleration
• Size
• Position

### Question 6

Question
A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is _____.
• Less than 100J
• More than 100J
• 100J
• Not enough information dude!

### Question 7

Question
A feather and a coin dropped in a vacuum fall with equal _____.
• Forces
• Accelerations
• Kinetic Energies

### Question 8

Question
Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate ____________.
• The same distance as the slower arrow
• Twice as far as the slower arrow
• Four times as far as the slower arrow
• More than four times as far as the slower arrow

### Question 9

Question
An object that has kinetic energy must be _____.
• Moving
• Falling
• At an elevated Position

### Question 10

Question
Engine A has a power rating of 500W and Engine B has a power rating of 1000W. What is true?
• Engine B can do more work than Engine A
• Engine B can change more KE than Engine A
• Engine A can do more work than Engine B
• Both engines can do the same amount of work, but Engine B can do the work faster.

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