WorksheetsWork and Energy Review-Physics
Total questions: 25
Worksheet time: 21mins
A man pushes a boulder and the boulder does not move. Which statement correctly describes the scenario
work is being done by a single object
All work done is external to the system
by pushing on the rock, the man causes a transfer of energy
no work is being done on the object
Which two measurements must be parallel for work to be done
force and displacement
distance and direction
constant force and power
power and work
A man carries a box across a room at constant velocity. Is work being done on the box by the man?
Yes
No
Half of the time
Not enough information
Which of the following is NOT a kind of energy that makes up mechanical energy in a system?
gravitational potential energy
kinetic energy
elastic potential energy
thermal energy
Units of work are...
Newtons
Grams
Joules
Meters
If you push a cart with a force of 60 N for 2 m... how much work have you done?
120 J
30 J
120 N
30 N
Which object has elastic potential energy?
a hanging leaf
a burning coal
a rolling ball
a stretched bow
Calculate the elastic potential energy Leo puts into the trampoline mat when he stretches the mat (k= 473 Nm-1) by 0.35 m.
2.887 J
28.97 J
82.775 J
12.76. J
According to the Law of Conservation of Energy, when one form of energy is transformed into another, __________ energy is lost in the process
no
some
all
A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What will be the work done?
50 J
60 J
20 J
45 J
An object has kinetic energy due to its _____.
motion
position
net force
acceleration due to gravity
An object has potential energy due to its _____.
speed
net force
motion
position
What is the stored energy an object has due to its being stretched or compressed?
work
kinetic energy
gravitational potential energy
elastic potential energy
A 73 kg cheerleader is 3.0 meters in the air, what is her PE?
2100J
219 J
657 J
3492 J
Calculate the force necessary to move a 1000 kg car from rest to 25 m/s in 130 m.
19 N
25,0000 N
2400 N
3.3 x 106 N
Work can also be shown as
W = ΔKEHow do you find ΔKE ?
KEi − KEf
KEf − KEi
KE + KPOP = BbyMtl
42?
What is the sum of kinetic energy and potential energy of a system?
mechanical energy
electrical energy
moving energy
nuclear energy
What is energy?
moving energy
stored energy
renewable energy
The ability to do work.
As a roller coaster moves down a hill, potential energy is converted into kinetic, thermal, and sound energy. What is true about the total energy?
Energy is gained/created
Energy is lost/destroyed
The total energy remains the same
The total energy is constantly changing
