WorksheetsEnergy Part 1 Review
Total questions: 24
Worksheet time: 18mins
Match the following
The SI unit for time is:
second
The SI unit for force is:
newtons
The SI unit for Power is:
Watt
The SI unit for Work is:
Joules
The SI unit for distance is:
meter
Gravitational potential energy depends on what two factors?
mass and force
volume and distance
mass and height above the ground
work and force
What are the two main factors that affect kinetic energy?
mass and velocity
mass and height
force and mass
volume and density
If mass and velocity affect kinetic energy, then which of the following would have the most KE?
A 10-kg car traveling with a speed of 30 m/s
A 10-kg car traveling with a speed of 60 m/s
A 10-kg car traveling with a speed of 40 m/s
A 10-kg car traveling with a speed of 20 m/s
Power is the rate at which _________ is done.
force
energy
work
time
The Law of Conservation of energy says energy ________________________.
energy cannot be created or destroyed, but it can change forms.
energy can be created, destroyed and can change forms
energy cannot be created, destroyed, or change forms
none of these are correct answers
The two main categories of energy is ________________ & __________________:
electrical and radiant
sound and chemical
nuclear and chemical
kinetic and potential
Energy stored in the bonds of compounds like the food we eat and fuel we use is called _________.
radiant
thermal
chemical
electrical
Energy in motion is called _____________________ energy.
electrical
radiant
chemical
kinetic
Which of the following is an example of kinetic energy?
mowing a lawn
gasoline in a can
fireworks that has not yet been exploded
food on a plate
__________________ energy is energy of an object due to its position above the ground (at rest).
potential
kinetic
electrical
chemical
Which is an example of potential energy?
heat from an oven
a ball rolling across a floor
playing a guitar
a rubberband stretched back and held
Which of the following is the correct formula for work?
1/2 (mass) x (velocity)2
mass x gravity x height
force x distance
work divided by the time
Which object has the greatest gravitational potential energy?
a 500-kg boulder on a 5-meter hill
a 500-kg boulder on a 20 meter hill
a 500-kg boulder on a 10 meter hill
a 500-kg boulder on the ground
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, potential
heat, electrical
gravitational potential, kinetic
How much work does an elephant do while moving a wagon 20 meters with a pulling force of 200N?
Work= fore (N) x distance (m)= Joules
400J
40,000J
40J
4,000J
A woman pushed on a heavy cabinet she was trying to move with a force of 20N. How much work was done? (did it move?)
Work= Force x distance= Joules
20N
she did 0N worth of work because she did not move the cabinet
200N
None of the above are the correct answers
How much power does a crane doing 60,000 Joules of work 300 seconds?
Power= work divided by time or P= Joules divided by seconds
200J
2,000J
20,000J
none of these are correct
A rock is sitting 40 meters above the ground on a cliff. The mass of the rock is 200-kg. What is the rocks gravitational potential energy.
Formula= mass (kg) x gravity (9.8) x distance (m)= Joules
70,000J
88,400J
78,400J
78,000J
What is the kinetic energy of a 3-kg ball that is rolling at 5 meters per second (m/s)?
Plug in your givens first: KE= 1/2 (3-kg) x (5)2= _________________Joules
37.5J
35.7J
40J
47.5J
Observe the diagram below. At which point on the roller coaster does the cart have the greatest kinetic energy?
1
3
4
2
Observe the diagram below. At which point on the roller coaster does the cart have the greatest gravitational potential energy?
1
4
3
2
The (a) something is moving, the more Kinetic energy it has.
(a) potential energy depends on height and mass of the object. Not height and power.
