WorksheetsChapter 2 Review - Energy, Work, and Simple Machines
Total questions: 34
Worksheet time: 35mins
Which of the following is not a form of stored energy?
chemical energy
electric energy
gravitational potential energy
nuclear energy
Which of the following does not transfer energy using waves?
radiant energy
sound energy
thermal energy
seismic energy
The figure shows four cars on a roller coaster track. At which point is the energy transfer from potential energy to kinetic energy the greatest?
between point A and point C
between point A and point B
between point B and point C
between point C and point D
Of the following types of electric energy plants, which transforms gravitational potential energy to electric energy?
fossil fuel
geothermal
hydroelectric
nuclear
What energy transformation occurs in a clothes iron?
chemical to electric
electric to thermal
kinetic to chemical
thermal to electric
Which is not an example of work?
holding a book in your arms
lifting a box from a table
placing a bowl on a high shelf
pushing a cart across the room
A bicycle is an example of a complex machine because .
it has one simple machine
it is made up of many simple machines
it can ride long distances
it does not need electricity
How much work did the man do on the toolbox in the illustration below?
0.06 m/N
17 N/m
425 J
2125 J
How does an inclined plane affect the work that is
done on an object?
It decreases the input distance.
It increases the input distance.
It decreases the amount of input force needed.
it decreases the amount of output force needed.
How can simple machines make work easier?
by increasing the amount of work done
by decreasing the amount of work done
by changing the distance or the force
needed to do the work
by getting rid of the work needed to move the object
Calculate the efficiency of the machine in the diagram.
efficiency = (output / input) x 100
= (190 J / 200 J) x 100 = 95%
efficiency = (input / output ) x 100
= (200 J/ 190 J) x 100 = 105
efficiency = (output x input)
= (200 J x 190 J) = 38000
efficiency = (output / input)
= (190 J / 200 J) = 0.95
The efficiency of a machine can ever be greater than 100%
True
False
Potential energy is highest when the object is at a (a) point.
Kinetic energy depends on (choose two answers)
mass
volume
weight
speed
The energy transferred by waves moving through the ground
Seismic energy
Sound energy
Electric energy
Thermal energy
A simple machine that consists a rigid bar that pivots on a fixed point
lever
pulley
wheel and axle
fulcrum
The device used to raise a flag up a flag pole is an example of a
wheel and axle
lever
inclined plane
pulley
work is equal to _____________ multiplied by distance
power
friction
force
acceleration
How much work is done if I use 5N of force to move an object 2 meters?
10 Newtons
7 Newtons
10 Joules
7 Joules
Work is done when .....
a force is exerted on an object.
an object exerts force onto another object.
a force is exerted on an object causing the object to move.
an object does not move.
Which law is this?
Kinetic Energy of wind is transferred to _____ Energy in a windmill.
Solar
Mechanical
Electrical
Potential
It took 50 Joules to push a chair 5 meters across the floor. With what force was the chair pushed?
10 N
0.1 N
250 N
1 N
Which is the correct unit for work?
Joules
Newton
meter
Watts
If you apply 20 Newtons of force to do 60 joules of work on an object, the object moves a distance of (a) metres.
