Work and Power

Question 1

What is the equation linking work done, force and distance moved in the direction of the force?

Answer 1

work done = force x distance moved

W = F x d

Question 2

What is the equation linking gravitational potential energy, mass, gravitational field strength and height

Answer 2

gravitational potential energy = mass x gravitational field strength x height
GPE = m x g x h

Question 3

What is the equation linking kinetic energy, mass and speed?

Answer 3

kinetic energy = 1/2 x mass x speed squared

Question 4

What is the equation linking power, work done and time taken?

Answer 4

power = work done/time taken
P = W/t

Question 5

What is work done?

Answer 5

when a force moves an object through a distance work is done on the object and energy is transferred

Question 6

What is the principle of the conservation of energy?

Answer 6

energy can be stored, transferred between stores and dissipated - but it can never be created or destroyed. the total energy of a closed system has no net change.

Question 7

What is power?

Answer 7

the rate at which energy is transferred