Physics

Question 1

Speed (m/s)

Answer 1

distance (m) / time (s)

Question 2

Acceleration (m/s^2)

Answer 2

change in velocity (m/s) / time (s)

Question 3

Force (N)

Answer 3

mass (kg) x acceleration (m/s^2)

Question 4

Weight (N)

Answer 4

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

Question 5

Efficiency

Answer 5

useful energy (J) / total energy (J)

Question 6

Momentum

Answer 6

mass (kg) x velocity (m/s)

Question 7

Wave speed (m/s)

Answer 7

frequency (Hz) x wavelength (m)
or
distance (m) / time (s)

Question 8

Density (kg/m^3)

Answer 8

mass (kg) / volume (m^3)

Question 9

Work done (J)

Answer 9

force (N) x distance (m)

Question 10

Change in GPE (J/kg)

Answer 10

mass (kg) x gravitational field strength (N/kg) x change in vertical height (m)

Question 11

Kinetic energy (J)

Answer 11

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

Question 12

Power (W)

Answer 12

work done (J) / time (s)   
or
energy transferred (J) / time (s)

Question 13

Energy transferred (J)

Answer 13

charge moved (C) x voltage (V)

Question 14

Charge (C)

Answer 14

current (A) x time (s)

Question 15

Voltage (V)

Answer 15

current (A) x resistance (Ω)

Question 16

Electrical power (W)

Answer 16

current (A) x voltage (V)
or
(current (A))^2 x resistance (Ω)

Question 17

Force exerted on spring (N)

Answer 17

spring constant x extension (m)

Question 18

Moment of a force (Nm)

Answer 18

force (N) x distance normal to the direction of the force (m)

Question 19

Pressure (Pa)

Answer 19

force normal to surface (N) / area of that surface (m^2)