Vocabulary
What's a joule?
What is unit of energy
The unit of potential energy
What is Joules
What has more kinetic energy object A which has a mass of 2kg and a velocity of 2m/s, or object B which has a mass of 1kg and a velocity of 3m/s.
What is object B?
A position where it established that an object has no potential energy
What is ground
A roller coaster is at the top of the track. What kind of energy does it have?
What is Potential
The type of energy found in car batteries.
What is chemical potential
What is the kinetic energy of a 55 kg boulder rolling down a hill at 10.2 m/s?
What is 2861.1 J
The kinetic energy of a ball at the bottom of a hill equals________.
What is potential energy at the top?
A ball is rolling down a hill. What kind of energy does it have?
What is kinetic
A 15 kilogram boulder sitting on top of a 1525 m mountain begins to roll down the mountain at 15 m/s . What is the potential energy of the boulder?
What is 224,175J
A 1400 kg podracer is flying at 150 km/h. What is the podracer’s kinetic energy?
1215277.78 J
A 9.00 kg object fall off a 1.2 m high table. If all of the objects potential energy is converted into kinetic energy just before it hits the floor, how much kinetic energy will it gain? How fast is it moving?
105.84 J
4.85 m/s
What is the type of potential energy determined by the amount of work gravity could do?
What is gravitational potential energy
An object has 65 J of gravitational potential energy, and is located 2.5 m above the ground. What is the mass of the object?
2.653 kg
A lightsaber is moving at 8.5 m/s with a kinetic energy of 470 J . What is the mass of the lightsaber?
13.01 kg
A 50 kg object has a velocity of 45 m/s right before hitting the ground. How high was this object dropped?
103.32 m
According to the Law of Conservation of Energy, what is the change in energy equal to?
What is 0
On planet X the gravitational field strength is different than on Earth. On Planet X a 100 kg astronaut climbs to the top of a 10 m hill gaining 8747 J of gravitational potential energy.
(a)What is the gravitational field strength on Planet X?
(b) How much potential energy would the same astronaut have on top of a 10 m hill on Earth?
(c) Would it be easier to climb up 10 m on Earth or Planet X? Explain.
a) 8.747 m/s^2
b) 9800 J
c) Planet X
The kinetic energy of a 2000 g droid is 500 J. What is the speed of the droid?
22.36 m/s
A 550 kg car rollercoaster is initially at rest at the top of a hill at 10m above the ground. What is the initial PE of the car at this point? When it reaches a point on a rollercoaster that is 5m above the ground, what is the kinetic energy of the car? What is the speed of the car at this point?
54000 J
27000 J
9.9 m/s