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WorksheetsQUIZ BEE REVIEW
Total questions: 50
Worksheet time: 42mins
You move a 0.8 kg object five meters in 4 seconds. How much power have you generated?
160 watts
10 watts
6.4 watts
17 watts
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
True or false You do work only when you exert a force on an object and move it.
true
false
Two factors that determine work are-
size of the force, and distance
size of the force, and type of force
mass, and distance
Work is a measurement of how much force is applied over a certain-
distance
velocity
shape
size
Units for work are-
netwons
joules
meters
seconds
Force = 200N
Distance = 50M
Work = ?
What FORMULA would you use to find the following problem?
W=FxD
P= W/T
DXW=F
D= W/F
Force = 200n
Distance = 50M
Work = ?
200N/ 50M =
4J
200N x 50M =10,000J
200N + 50M =
250J
W= 75 J
Force = 5N
D = ?
15 M
2M
20 M
10M
P= 25 watts
W= 5000 J
t= ?
150 sec
200 sec
30 M
100m
In which case is work being done?
A
B
C
D
what would 14J be an example of?
work
distance
time
force
You do 90 joules of work in 30 seconds. How much power have you generated?
30 watts
3 watts
120 watts
270 watts
While rowing across the lake during a race, John does 3960 J of work on the oars in 60 seconds. What is his power output?
56W
100W
66W
None of the answers are correct
A horse performs 15,000 joules of work pulling a wagon for 20 seconds. What is the horse's power?
750 W
300 W
2.25 J
An object above Earth's surface has ___________ energy.
kinetic
gravitational potential
radiant
ultraviolet
The amount of ____________________ energy is determined by the mass of an object and it's speed. ( a 200lb running back running a 4.4 second 40 yard dash)
potential
electric
nuclear
kinetic
All the types of energy within a system, such as sound, light, thermal, kinetic energy, and potential at a football game is known as
mechanical energy
thermal energy
electric energy
gravitational potentialI
A collection of stuff that works together as a whole is a
system
category
grouping
collection
The sum of kinetic and potential of a single object is
thermal
mechanical
electric
nuclear
A __________ can transfer energy from one place to another.
electrons
proton
wave
witch
What type of energy makes a water wheel turn?
Electrical
Mechanical
Sound
Thermal
What form of energy do all activities shown use?
Mechanical
Electrical
Sound
Light
When a bat searches for prey at night, it makes sounds as it flies, and it uses the sounds' echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using--
thermal energy and light energy
sound energy and thermal energy
mechanical energy and sound energy
light energy and mechanical energy
Energy released when atoms split or join together is called
Gravitational
Nuclear
Elastic
Chemical
Energy stored in an object when it is compressed or stretched like in a spring or rubber band is called...
Sound
Elastic
Radiant
Chemical
Malcolm's class has been assigned a project in which it is to build a four-wheeled vehicle to transport a soda can across the classroom. The car will be powered by stretching rubber bands around an axle before releasing the vehicle on the floor.
The vehicle will be powered by transforming _______ energy into _______ energy.
mechanical; thermal
thermal; mechanical
elastic potential; kinetic
kinetic; elastic potential
Devon is playing with a yo-yo. A yo-yo has an axle in the middle of two plastic halves. A string is tied around this axle. As Devon moves his hand, the yo-yo goes up and down. The yo-yo converts potential energy to kinetic energy as it moves.
Which of the following pictures represents the yo-yo with the most potential energy?
Mr. Draper asks his class to design a system of gears, strings, and pulleys that will allow him to pull back the classroom's curtains simply by turning a crank at his desk.
The system must be built within the following constraints:
*It must be made only out of metal gears, metal pulleys, string, and one crank.
*It must be strong enough to move the curtains.
*It cannot be in the way of students or their desks.
*It must take no more than one day to build.
The final design will use which type of energy to perform work on the curtains?
kinetic energy
gravitational potential energy
thermal energy
elastic potential energy
Robin is swinging back and forth from a trapeze.
In which of the following situations is his kinetic energy being transformed into potential energy?
when his speed is increasing and his height is decreasing
when his height is not changing and his speed is zero
when his height is increasing and his speed is decreasing
when his height and speed are both equal to zero
Which of the following is an example of work being done on an object?
A wagon is used to carry vegetables from a garden.
A pulley is used to get water from a well.
A hammer is used to remove a nail from a wall.
all of these
Which of the following situations describes an object's kinetic energy being converted into gravitational potential energy?
A penny sits motionless on a shelf.
A ball rolls up an inclined ramp.
An apple is dropped from a second-story window.
A water particle flows down a mountain stream.
Which of the following is an example of kinetic energy being converted to potential energy?
At an ice rink, an ice skater gives another ice skater a gentle push.
A bike rider stops pedaling and lets his bicycle coast up a hill.
The cord of a bow-and-arrow is released, propelling the arrow forward.
On a factory assembly line, boxes slide down a ramp.
An asteroid is falling toward planet Earth from space. It has a height of 100,000 km.
As the asteroid falls closer to the Earth's surface, its _______ energy decreases and its _______ energy increases.
chemical; heat
kinetic; gravitational potential
heat; chemical
gravitational potential; kinetic
The following diagram of a pendulum shows the path it takes as it swings back and forth.
As the pendulum moves from point 1 to point 2, what happens to its mechanical energy?
Kinetic energy is converted to potential energy and back again.
Potential energy is converted to kinetic energy only once.
Potential energy is converted to kinetic energy and back again.
Kinetic energy is converted to potential energy only once.
Danielle has a rubber band. She stretches the rubber band with her fingers. After she releases the rubber band, it flies through the air.
Which of the following is true about the energy of the rubber band?
Both the stretched rubber band and the released rubber band have only kinetic energy.
The stretched rubber band has more potential energy, and the released rubber band has more kinetic energy.
The stretched rubber band has more kinetic energy, and the released rubber band has more potential energy.
Both the stretched rubber band and the released rubber band have only potential energy.
Why does the straw appear to be bent?
light is reflected
light is absorbed
light is turned
light is refracted
What do we call a material that light can travel through?
air
water
medium
pathway
Identify the following image as or refraction.
Refraction
Reflection
In the illustration, the light ray striking the object is-
Which figure represents the path light takes through a converging lens?
