WorksheetsModule 4:Work and Energy Review Game
Total questions: 66
Worksheet time: 50mins
Work causes a change in
Sweat
Energy
Calories
Force
Kinetic energy is associated with ---.
speed
position
direction
temperature
Where is the kinetic energy of pendulum at its highest?
at the top of the swing
at the bottom of the swing
at 1/4 of the swing
at 3/4 of the swing
Where does the pendulum have the least amount of potential energy?
A
B
C
D
E
Where is kinetic energy at its maximum?
a
b
c
d
A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is(g = 10 m/s2)
(a) 500 J
(b) 50 J
(c) 5 J
(d) 5000 J
what is defined as the product of the magnitudes of displacement and the
component of the force parallel to the displacement ?
work
energy
momentum
power
When an object is carried at a constant
velocity by a force,
no work is done on the
object.
the work done is maximum on the
object.
the work is done minimum on the
object.
the work done is 100 % on the
object.
A boy pushes a book kept on a table by applying a force of 4.5 N. find the work done by the force, if book is displaced through 0.3 m along the direction of push
1.10 J
1.25 J
1.35 J
None
1. Which of the following simple machines would you use to open a soda bottle?
Lever
inclined plane
Screw
Pulley
4. The ability to do work is called________.
force
machine
energy
work
5. Identify the simple machine which is a form of two inclined planes joined together.
lever
wedge
screw
wheel and axel
7. Frictional force ______ the motion of an object7.
opposes
help
8. We use ______ to make our work easy.
machine
muscles
9. Levers are slanting surfaces used to push or pull heavy objects to a certain height.
true
false
10.The force applied by the Earth on the object called _________ force.
Frictional
muscular
Gravitational
The sum of kinetic and potential energy is called...
sum energy
nonmechanical energy
mechanical energy
space energy
The total amount of energy
varies
can cancel out to zero
goes out into space
remains constant
work is done when
the object you apply a force on moves
any force is applied to an object, regardless if it moves or not
the force is zero
the force and direction of motion are perpendicular
Energy stored due to the position of the object
potential
positional
total
kinetic
What is the rate at which energy is converted?
potential energy
kinetic energy
mechanical energy
power
The ability to do work is called
energy
force
power
machine
A device that changes the force or increases the motion from work is a
computer
engineer
automobile
machine
All are examples of a simple machine EXCEPT
a lever
a pulley
motor
wheel and axle
A moving van burns gasoline in its engine. During this process it converts
chemical energy to mechanical energy
kinetic energy to potential energy
thermal energy into electrical energy
mechanical energy into kinetic energy
What is the unit of report for energy?
Joules
meters
newtons
grams
The equation for work is
W= fd
W= fN
W=mv
W=wh
It is the rate of doing work
Energy
Power
Force
Acceleration
Pushing a cart. Is it an example of work?
NO
YES
MAYBE
I am not sure
Pulling a bow. Is it an example of work?
NO
YES
MAYBE
I am not sure
Lifting your bag. Is it an example of work?
NO
YES
MAYBE
I am not sure
A waiter carrying a tray while walking. Is it an example of work?
NO
YES
MAYBE
I am not sure
Pushing against the wall. Is it an example of work?
NO
YES
MAYBE
I am not sure
Which of the following affects the potential energy of an object?
mass
velocity
height or distance
speed
Which of the following affects the kinetic energy of an object?
mass
velocity
height
distance
What is the mechanism that manipulates magnitude of force and distance? They make our lives easier.
Mechanical Advantage
Simple Machines
Work
IMA
A wedge is struck with a force of 20 lbs. The wood the wedge is splitting resists with a force of 80 lbs. What is the mechanical advantage of the situation?
2
3
4
5
The ratio of magnitude and resistance forces is
Mechanical Advantage
Pulley
Simple Machines
Levers
How can simple machines make work easier?
by decreasing the force needed to complete the task
by increasing the friction between the machine and the object
by adding more work on the object than originally applied
by removing the force of gravity on the object
A doorknob is an example of a _______.
wheel and axle
inclined plane
pulley
wedge
The fixed point around which a lever rotates is know as the
wheel.
fulcrum.
input force.
output force.
A ramp is an example of a(n) _______.
inclined plane
fulcrum
force
lever
Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?
pulley
screw
wedge
lever
Two inclined planes together that helps push things apart.
pulley
wedge
gear
lever
A seesaw is what simple machine?
lever
inclined plane
pulley
gear
A complex machine is:
the same as a single simple machine
two simple machine only
two or more simple machines
four simple machine
what is the law of conservation of energy
energy can be created but cannot be destroyed
energy cannot be created or destroyed, but it can be transformed
energy can be destroyed but not created
energy cannot be created destroyed or transformed
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
Total energy = 200J
Useful energy = 20J
Workout the efficiency of this lightbulb.
efficiency = total energy inuseful enegy ×100
100%
80%
40%
10%
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
100%
7%
93%
95%
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 1.5 kg.
Calculate the final velocity of the baby carriage if it were to roll down the hill. Assume any frictional forces are negligible.
Give your answer to 1 decimal place.
(a)
W=5000 Joules
t=???
