Energy power and work done

Question 1

What is energy?

Answer 1

The capacity to do work.

Question 2

What is kinetic energy?

Answer 2

The energy of a body due to its motion.

Question 3

What is potential energy?

Answer 3

The stored energy in a system

Question 4

What is chemical potential energy?

Answer 4

The energy stored in a substance due to the position of atoms or electrons in a substance

Question 5

What is elastic potential energy?

Answer 5

The energy stored in a body due to its elastic deformation

Question 6

What is gravitational potential energy?

Answer 6

The energy stored in a body due to its height above the ground

Question 7

What are the principles of conservation of energy?

Answer 7

Energy cannot be created or destroyed but can be converted from one form to another. The total energy in an isolated system remains constant

Question 8

what is the efficiency formula?

Answer 8

efficiency=useful energy output/total energy input times 100%

Question 9

what is work done?

Answer 9

work done by a constant force of an object is the product of the force and the distance moved by the object in the direction of the force.

Question 10

when is work done?

Answer 10

when the object moves in the direction of the applied force

Question 11

what is the formula for kinetic energy?

Answer 11

e=1/2mv2

Question 12

what is the formula for gravitational potential energy?

Answer 12

e=mgh

Question 13

what is power?

Answer 13

the rate of work done/the rate of energy conversion

Question 14

what is the formula for power?

Answer 14

p=wd/t or p=e/t time is in seconds, work done and energy is in joules.