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Misc.
Calculating PE
Calculating KE
Units
KE or PE?
100

What is the mass in the following problem? A 55 kg man is running at 4 m/s.

55kg

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

List 6 forms of energy.

Chemical, nuclear, thermal, electric, electromagnetic, mechanical, sound

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

What is the difference between kinetic energy and potential energy?

Kinetic energy is motion. Potential energy is stored energy due to it's position (height).

300

How much potential energy would a 3 kg table have if it's at the top of a hill 117 m high?

What is 3439.8 J

300

If 961 J of work is necessary to lift an object by 13.6 m, what is the mass of the object?

Ep=mxgxh

M=Ep/gxh

M=961/(9.8x13.6)

7.20Kg

300
In calculating KE and PE problems, what unit is velocity?
m/s
300
Gasoline in a tank
Potential
400
What is Mass?
The amount of matter in an object and never changes
400

If a 83.3-kg object is lifted above the ground so that its potential energy increases by 5050 J, how high was it lifted?  

6.18 m

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

Write the correct energy conversion order a PS4 goes through when you turn it on.

Electrical, Mechanical, Electromagnetic, Thermal

500

How much gravitational potential energy is stored in a 344-kg object that is held 52.6 m above the ground

Some energy is lost due to friction, heat, and sound.

500

Jed'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?

1/2mxv^2


2.401 J

500
What unit is used for Potential Energy?
Joules (or newton meter)
500
A running refrigerator motor
Kinetic