Physics work and power equations revision

Question 1

What does energy transferred equal?

Answer 1

Work done

Question 2

What is the equation for work done?

Answer 2

work done = force applied x distance moved

Question 3

what is the equation for a change in an objects gravitational potential energy?

Answer 3

Weight x change of height or mass x gravitational field strength x change of height.

Question 4

What is the equation for kinetic energy?

Answer 4

0.5 x mass x speed squared

Question 5

what is the equation for elastic potential energy?

Answer 5

0.5 x spring constant x extension squared

Question 6

what is the equation for efficiency?

Answer 6

useful output energy transferred by the device divided by total input energy to the device.

Question 7

what is the equation for power?

Answer 7

work done divided by time or energy transferred divided by time

Question 8

What is the equation for density

Answer 8

mass divided by volume

Question 9

what is the equation for force applied to a spring

Answer 9

spring constant x extension

Question 10

what is the equation for energy transferred

Answer 10

power x time

Question 11

what is the equation for weight

Answer 11

mass x gravitational field strength