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Misc.
Calculating PE
Calculating KE
Units
KE or PE?
100
Energy of motion
Kinetic Energy
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
A skier at the top of a mountain
potential energy
200
Stored Energy
Potential 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
A race car traveling at its maximum speed
Kinetic Energy
300
The ability to do work
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
Gasoline in a tank
Potential
400
The amount of matter in an object and never changes
Mass
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
Burning a match
Kinetic
500
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transferred
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
A running refrigerator motor
Kinetic