NEW
Font size
WorksheetsEnergy, Work, and Power Review
Total questions: 15
Worksheet time: 2hrs 49mins
How much energy is expended when a 10.0 kg box is moved 2.0 m?
20.0 J
5.0 J
0.20 J
2.5 J
When a baseball is thrown, its kinetic energy and angular kinetic are the same.
True
False
Which of the following is NOT a representation of the correct units for energy?
J
N∙m
kg∙m2/s2
W
The work-energy theorem states when work is done on an object, the result is a change in energy.
True
False
Which of the following is completely accurate?
When the displacement is zero, no work is ever done.
In a closed, isolated system energy is conserved.
In a closed, isolated system energy is conserved, though energy may be used to do work.
When work is done on a system, the final energy is calculated using the equation: MEo = W + MEf.
A spring’s potential energy is proportional to the square of object’s displacement from its equilibrium point.
True
False
Mechanical energy is the sum of an object’s kinetic energy and any potential energies.
True
False
Isaac carried a 15.0kg box up a flight of 10.0 m stairs in 10.0 s. Brandon carried a 6.0 kg box up a long, 100.0 m ramp in 40.0s. Which of the following is true about power?
Isaac performed with more power than Brandon
Brandon performed with more power than Isaac.
Isaac and Brandon had the same power.
There is not enough information to determine power.
Work can be positive and negative.
True
False
Rotational kinetic energy is calculated with which equation?
L = 1/2 Iω2
L = 1/2 Iω
L = Iω2
L = Iω
Jayden climbs to the top of the Empire State Building (m = 381m). He drops a quarter (m = 5.67g). What is the quarter's initial potential energy?
2.11 x 104 J
6.85 J
2.11 x 107 J
21.2 J
Jayden climbs to the top of the Empire State Building (m = 381m). He drops a quarter (m = 5.67g). What is the quarter's velocity just before it hits the ground?
61.5 m/s
7,475 m/s
6.1 m/s
86.5 m/s
The potential energy of a spring can be calculated by which of the following equations?
PEs = 1/2 kx2
PEs = 1/2 kx
PEs = kx2
PEs = kx
The potential energy of a spring is zero at what point?
At the equilibrium point
Compressed as much as possible
Extended as much as possible
There is always potential energy in a spring
Which of the following does not belong within mechanical energy?
chemical potential energy
spring potential energy
gravitational potential energy
kinetic energy
All of the other answers are part of mechanical energy.
