WorksheetsUnit 2 Quiz
Total questions: 20
Worksheet time: 10mins
Energy that comes from a source and travels through space at the speed of light.
conduction
convection
radiation
conductor
Why does copper transfer heat more effectively than rubber?
because copper is an insulator
because copper is a nonmetal
because copper is a metalloid
because copper is a conductor
The motion of atoms and molecules in a substance is
thermal energy
chemical energy
mechanical energy
electromagnetic energy
A ball is dropped from the top of a cliff. As the ball falls to the ground,
what happens to its energy?
The ball’s potential energy increases, but its kinetic energy remains
constant.
The ball’s potential energy decreases, but its kinetic energy remains
constant.
The ball’s potential energy decreases, but its total mechanical energy
remains constant.
The ball’s potential energy increases, but its total mechanical energy
remains constant.
Why is the output energy of a machine always less than the input energy?
Some of the energy is released as heat when converted.
Useful energy decreases as energy is transferred to the surroundings.
The machine must overcome the constant force of magnetism.
Some of the energy is destroyed as the machine operates.
In a closed system, what happens to the total energy of the system as energy conversions take place?
It decreases
It is transferred out of the system
It increases
It remains constant
A construction worker hit a solid steel wall with a sledgehammer, but the wall did not move. Part of the energy exerted by the worker
was converted into heat
was destroyed by the steel wall
disappeared into the atmosphere
was stopped by the hard surface
A woman exerts 20.0 N of force to lift a box 3.0 m off the ground. How
much work is done on the box?
23 J
60. J
17 J
6.7 J
A young boy carrying a backpack is walking along a path. What could he
do to work against the force of gravity?
He could start running.
He could walk slower.
He could sit down.
He could walk up a hill.
Tim was welding a pipe on his truck. He touched it with his hand and burned himself badly. What type of energy transfer happened with the pipe and his hand?
Conduction
Convection
Radiation
Paulina is in her house and she goes upstairs and notices it is hotter than downstairs. Why does this occur?
Conduction
Convection
Radiation
Brody is near a fire and heats up near it because he was cold and while he was at it he made some smores. How is he using the fire's energy to get warm?
Radiation
Convection
Conduction
Alex is doing some yard work outside and he feels that the sun is very hot that day so he decides to change and jump into the pool. What type of energy transfer was the sun giving off on Alex?
Convection
Conduction
Radiation
A warehouse worker applied a force of 505 N to push a crate across the
floor. If the worker performed 33,500 J of work, how far was the crate
moved? (Ignore friction.)
0.02 m
33.5 m
66.3 m
134 m
A wedge and a screw are variations of what type of simple machine?
inclined plane
lever
wheel and axle
pulley
How much power is needed to lift a 200-N box a height of 20 meters in 5
seconds?
20,000 W
400 W
50 W
800 W
How much power was generated by a person who exerted 110. J of work
in 5.00 s?
0.04 W
105 W
22.0 W
550. W
What is the frequency of a wave that travels 20 m/s with a wavelength of 200 meters?
10 Hz
0.10 Hz
4.0 Hz
4000 Hz
How do light waves differ from sound waves?
Light waves maintain the same speed in different mediums.
Light waves travel in one direction from the vibrating source.
Light waves are able to travel through a vacuum.
Light waves push and pull matter in the same direction of the wave.
How does the speed of radio waves compare with the speed of infrared waves?
They both travel at the same speed.
Radio waves travel faster.
Infrared waves travel faster.
The wave speed varies with their frequency.
