Energy

Question 1

What are the possible units for energy?

Answer 1

N•m

or

m/s² • kg

or

Joules (J)

Question 2

It is the capacity to do work.

Answer 2

Energy

Question 3

It states that when work is done on an object, there will be a change in kinetic energy or energy of motion.

Answer 3

Work-Energy Theorem

Question 4

What is the formula for kinetic energy?

Answer 4

KE = 1/2 mv²

Question 5

What are the two types of energy?

Answer 5

Kinetic energy and potential energy

Question 6

What is the difference between kinetic and potential energy?

Answer 6

Kinetic - Energy in motion
Potential - Energy in position

Question 7

Potential energy is also called as?

Answer 7

Gravitational potential energy

Question 8

Gravitational potential energy states that?

Answer 8

The greater the height means greater potential energy

Question 9

What is the formula for potential energy?

Answer 9

PE = mgh

Question 10

What are the different formula that we can use and different cases when work is done on an object?

Answer 10

When work is slightly parallel with direction:

W = F (cos angle) d

When work is opposite with direction:

W = -F (cos angle) d

When work is parallel with direction:

W = F • d

When work is perpendicular to the surface:

W = 0

Question 11

What are the two formulas under the conservation of energy?

Answer 11

mgh + 1/2 = Constant

PE + KE = Constant