Equations

Question 1

Distance travelled =

Answer 1

Average speed x time

X = s x t

Question 2

Acceleration =

Answer 2

Change in velocity ➗ time

A = (V-U) ➗ t

Question 3

Force=

Answer 3

Mass x acceleration

F = M x a

Question 4

Weight=

Answer 4

Mass x gravitational field strength

W = M x g (10)

Question 5

Momentum =

Answer 5

Mass x velocity

P = M x v

Question 6

A change in gravitational energy =

Answer 6

Mass x gravitational field strength x change in vertical height

^GPE = M x 10 x ^h

Question 7

Kinetic energy =

Answer 7

0.5 x mass x speed squared

KE = 0.5 x m x v2

Question 8

Efficiency =

Answer 8

Useful energy transferred ➗ total energy supplied to device

Question 9

Wave speed =

Answer 9

Frequency x wavelength

V = F* x h*

     OR

Distance➗time

V = X ➗ T

Question 10

Work done =

Answer 10

Force x distance moved in direction of the force

E = F x D

Question 11

Power =

Answer 11

Work done ➗ time taken

       OR

Energy transferred ➗ time taken

Both

P= E ➗ T

Question 12

Energy transferred =

Answer 12

Charge moved x potential difference

E = Q x V

Question 13

Charge =

Answer 13

Current x time

Q = I x T

Question 14

Potential difference =

Answer 14

Current x resistance

V = I x R

Question 15

Electrical power =

Answer 15

Current x potential difference

P = I x V

       OR

Current squared x resistance

P = I2 x R