Energy resources & Energy transfers

Question 1

What is the relationship between work done, force and distance?

Answer 1

Work done = force x distance moved
W = F x d

Question 2

Work done is ___________ to energy transferred

Answer 2

equal

Question 3

What is the relationship between gravitational potential energy, mass, gravitational field strength and height?

Answer 3

Energy = mass x gravitational field strength x height
GPE = m x g x h

Question 4

What is the relationship between kinetic energy, mass and velocity?

Answer 4

Kinetic energy = 1/2 x mass x velocity squared
K.E. = 1/2 m x v2.

Question 5

How does conservation of energy produce a link between gravitational potential energy, kinetic energy and work?

Answer 5

Work done is equal to the change in kinetic energy or gravitational potential energy. If work is done on an object, its KE or GPE will increase. Conversely, if work is done by an object, its KE or GPE will decrease.

Question 6

Define power in the context of energy.

Answer 6

Power is the rate of transfer of energy or the rate of doing work

Question 7

What is the relationship between Power, work done (energy transferred) and time taken?

Answer 7

Power = work done ÷ time taken