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 equation for calculating work.
What is force x distance (displacement)?
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 150,000 J?
200
If a bullet is fired up at 320 m/s, this is the maximum height the bullet would reach.
What is 5120 m high?
200
If an object is moving at a constant velocity, what equation can you use?
What is P=Fv?
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 65 kg 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 400 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 1000 J?
400
A pendulum bob is released from some initial 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
This is the power exerted by lifting a 50 kg barbell 1.6 m high in 0.8 s.
What is 980 W?
500
If you are carrying a bowling ball from the front of the room to the back of the room, have you done work?
What is no?
500
This is the mass of a bowling ball that is traveling 2.0 m/s and has 16 J of kinetic energy.
What is 8 kg?
500
Chuck weighs 500 N on a bathroom scale containing a heavy spring. The spring is compressed 1.25 cm under his weight. Find his potential energy.
What is 3.12 J?
500
If external work is done on an object, how does it change the law of conservation of energy?
What is KEi+PEi+Wext=KEf+PEf?
500
This is how long it takes a 19 kW steam engine to do 6.8 x 10^7 J of work.