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Misc.
Calculating PE
Calculating KE
Units
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100
What is Energy?
The ability to do work
100
What is the formula for calculating PE?
PE = m x g x h
100
Which has more Kinetic Energy, a ball moving at 3 m/s or 5 m/s?
5 m/s
100
In calculating PE, and KE energy problems, what unit is used for height?
meters
100
What is energy?
The ability to do work.
200
What are chemical, nuclear, thermal, electric, electromagnetic, mechanical, (and sound)?
The 6 fundamental forms of energy.
200
Calculate the PE of a rock that has a mass of 60 kg and is 10 m high.
5880 J
200
Determine the kinetic energy in a 7 kg ball thrown with a velocity of 21 m/s.
1543.5 Joules
200
In calculting PE and KE problems, what unit is mass?
Kilogram
200
Why do you come back down when you jump into the air?
Gravity!
300
Kinetic energy is motion. Potential energy is stored energy due to it's position (height).
What is the difference between kinetic energy and potential energy?
300
What is 3439.8 J
How much potential energy would a 3 kg table have if it's at the top of a hill 117 m high?
300
The computer weighs 3 kg and is thrown at a velocity of 5 m/s. Calculate the Kinetic energy.
37.5 Joules
300
In calculating KE and PE problems, what unit is velocity?
m/s
300
List 3 forms of potential energy
Gravitational, chemical, stored mechanical, nuclear
400
What is Mass?
The amount of matter in an object and never changes
400
Which has more potential energy, a calculator on the ground or a calculator on the table 1.5 m high?
on the table. (greater height)
400
Calculate the kinetic energy of a 15 kg cart going 60 m/s.
27,000 J
400
What is the unit for Kinetic Energy?
Joules (or newton meter)
400
List 3 forms of kinetic energy.
Motion (mechanical), heat (thermal), sound, light (radiant), electrical
500
Electrical, Mechanical, Electromagnetic, Thermal
Write the correct energy conversion order a PS4 goes through when you turn it on.
500
Why might there be (slightly) more Potential Energy at the top of a rollercoaster than the total amount of energy at the very end of the ride?
Some energy is lost due to friction, heat, and sound.
500
Ms. Celetti's pencil weighs 0.05 kg and is dropped from the table 1 m high. The pencil falls at a velocity of 9.8 m/s. What is the pencil's KE?
2.401 J
500
What unit is used for Potential Energy?
Joules (or newton meter)
500
What is the law of conservation of energy?
Energy cannot be created nor destryoed, only changed in form.