Font size
WorksheetsBimester 2 - Revision
Total questions: 16
Worksheet time: 12mins
What is needed calculate power?
work
time
mass
distance
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
How does conservation of energy explain why something that is falling should speed up?
It gains kinetic energy because it gains potential energy.
It loses kinetic energy because no work was done on it.
It gains kinetic energy because it loses potential energy.
It loses kinetic energy because the Earth gains potential energy.
The Law of Conservation of Energy states:
Energy can created or destroyed but not transformed
Energy cannot be created or destroyed, it can only transformed
Energy can't be created, destroyed or transformed
Energy cannot be created or destroyed.
What kind of energy does an object possess when it's resting on top of the hill?
Potential Energy
Chemical Energy
Kinetic Energy
All of the above
What is the formula for Kinetic Energy?
KE = mass x velocity
KE= 1/2 x mass x velocity 2
KE = mass x gravity x height
KE = mass x velocity / 2
Total energy = 200J
Useful energy = 20J
Workout the efficiency of this lightbulb.
efficiency = total energy inuseful enegy ×100
100%
80%
40%
10%
Which of the following is the correct equation for calculating an object's gravitational potential energy?
PE = mgh
PE = mg / h
PE = mg + h
PE = gh
What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?
g = 9.8 m/s2
9.8 Joules
1.0 Joule
0.10 Joule
11.8 m/s2
25 N force is applied to a box and box moves 10m. Find the work done by the force.
250J
25.48J
25N
2452.5J
The formula for calculating the gravitational potential energy in an object is shown above. GPE will get bigger if
There is more than 1 correct answer
the object has a greater mass
the object is higher above the ground
the object is on the ground
the object is smaller
The formula for calculating the kinetic energy in an object is shown above. KE will get bigger if
There is more than 1 correct answer
the object has a greater mass
the object is moving quickly
the object is moving slowly
the object has a smaller mass
