Equations For 1-3

Question 1

Kinetic energy equation

Answer 1

1/2 x mass x speed2
1/2mv2

Question 2

Gravitational potential energy

Answer 2

GPR=mass x gravitationtional field strength x height
Ep-mgh

Question 3

Power

Answer 3

Power=work done/ time taken or energy transferred/time taken

Question 4

Efficiency

Answer 4

Efficiency=useful energy output/total energy output

Question 5

Weight

Answer 5

Mass x gravitatioanl field strength
W=mg

Question 6

Work done

Answer 6

Force x distance
W=Fs

Question 7

Force applied

Answer 7

Spring constant x extension

Question 8

Moment of a force

Answer 8

Force x distance
M=Fd

Question 9

Pressure

Answer 9

Force normal to a surface/area of that surface
P=F/A

Question 10

Distance travelled

Answer 10

Speed x time
S=vt

Question 11

Acceleration

Answer 11

Final velocity-initial velocity/time taken
A=v-u/t

Question 12

Resultant force

Answer 12

Mass x acceleration
F=ma

Question 13

Momentum

Answer 13

Mass x velocity
P=mv