Unit 5 Concept Quiz

Nicholas Weiss
Quiz by Nicholas Weiss, updated more than 1 year ago
Nicholas Weiss
Created by Nicholas Weiss about 6 years ago
72
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 _____.
Answer
  • 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?
Answer
  • 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 _____.
Answer
  • 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?
Answer
  • Joule per second
  • Watt
  • Newton-second
  • HorsePower

Question 5

Question
An object that has gravitational potential energy has this energy because of its _____.
Answer
  • 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 _____.
Answer
  • 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 _____.
Answer
  • 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 ____________.
Answer
  • 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 _____.
Answer
  • 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?
Answer
  • 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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