Work
Kinetic Energy
Potential Energy
Conservation of Energy
Power
100
This is the unit of Work
What is a Joule?
100
These are the two variables that kinetic energy is dependent upon
What are mass and velocity?
100
This is the equation for gravitational potential energy
What is PE=mgh
100
A ball is sitting on a ledge. This is the kinetic energy of the ball if the potential energy it had before it was dropped was 30 J.
What is 30 J?
100
This is the unit for power.
What is Watt (or Joule/sec)?
200
This is the relationship between Net Work and Kinetic Energy
What is Net Work = change in KE
200
This is the amount that kinetic energy changes when the velocity of an object is doubled.
What is increased x4?
200
This is how much potential energy is gained by a 150 kg climber that scales a 100 m cliff.
What is 147,000 J?
200
If a bullet is fired up at 320 m/s, this is the maximum height the bullet would reach.
What is 5224.5 m high?
200
This is the power exerted by lifting a 50kg barbell 1.6 m high in 0.8 s.
What is 98 W?
300
If a neighbor pushes a lawnmower four times as far as you do but exerts only half the force, this is the person who has done more work...and by this much.
The neighbor ... 2x as much work
300
This is the amount of kinetic energy of a 65kg sprinter running at 8.4 m/s?
What is 2293.2 J?
300
This is the loss in potential energy of an 8kg apple that falls from a 5 m high tree branch.
What is (-) 392 J?
300
A plane is flying at 480 m/s at an altitude of 987 m when it drops a 128 kg box. This is the velocity of the box when it hits the ground.
What is 500 m/s?
300
This is how many joules of energy a 60W light bulb can produce in 25 minutes.
What is 90,000 J?
400

This is the amount of net work done on a box that moves 20m and is pushed with a 350N horizontal force and has 120 N of friction force acting upon it.

What is 4600 J?

400
This is the speed of a 35000 kg train that has a kinetic energy of 282,000 J.
What is 4.01 m/s?
400
Determine the gravitational potential energy of a guillotine if the mouton (the weighted blade) has a mass of 40 kg and is raised 2.5 m above the neck of the condemned.
What is 980 J?
400
A pendulum bob is released from some intitial height such that the speed of the bob at the bottom of the swing is 1.9 m/s. This is the initial height of the bob.
What is 0.18 m?
400
An automobile engine delivers 50 hp of power. This is how much time it will take for the engine to do 6.4 x 10^5 J of work. (1 hp = 746 W)
What is 17.2 s?
500

This is how much work is done on a 50kg wagon that is pulled with 400 N of force at an angle of 25 degrees. The wagon moves 5m across a dirt path with a coefficient of friction of 0.23

What is 1443.56 J

500
This is the change in kinetic energy of a 9kg bowling ball that accelerates from rest at a rate of 3 m/s^2 for 3.7 sec.
What is 554.4 J?
500
This is the change in potential energy when a 49 kg rock, initially 200m above the ground, falls to a ledge 138 m above the ground.
What is 29772.4 J?
500
A toy company makes little cars that are 2kg each. Sometimes when on the 8 m tall box line, the little cars roll off with a speed of 1.2 m/s. This would be the speed of a falling car when it has fallen halfway down.
What is 8.93 m/s?
500
This is how long it takes a 19 kW steam engine to do 6.8 x 10^7 J of work.
What is 3579 s --> 0.99 hr?
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