Equations

Question 1

Work done (energy transfered) (J)=

Answer 1

Force (N) x distance (m)

Question 2

Change in objects’ gravitational potential energy store (J)=

Answer 2

Weight (N) x change of height (m)

Question 3

Weight (N)=

Answer 3

Mass (kg) x gravitational field strength (N/kg)

Question 4

Kinetic energy (J)=

Answer 4

1/2 x mass (kg) x speed^2 (m/s)

Question 5

efficiency=

Answer 5

Output energy (J) / Input energy (J) (x100 to make it a %)

Question 6

Power (W)=

Answer 6

Energy transferred (J) / time taken (s)