Paper 2

Question 1

Pressure (simple)

Answer 1

P = f/a

Question 2

Pressure of a fluid

Answer 2

Pressure = height (m) x density (kg/m^3) x gravity (N/kg)

Question 3

Speed

Answer 3

Distance travelled (m) / time taken (s)

Question 4

Acceleration

Answer 4

(M/s^2) = change in velocity (m/s) / time taken (s)

Question 5

Resultant force

Answer 5

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

Question 6

Weight

Answer 6

N = mass (kg) x gravity (N/kg)

Question 7

Momentum

Answer 7

Kg m/s = mass (kg) x velocity (m/s)

Question 8

Elastic force

Answer 8

N = Spring constant (N/m) x extension (m)

Question 9

Impact force reduced

Answer 9

N = mass(kg) x change in velocity (m/s) / time taken (s)

Question 10

Moment

Answer 10

N m = force (N) x distance (m)

Question 11

Force with magentic flux density

Answer 11

Force (N) = magnetic flux density (t) x current (i) x length (m)

Question 12

Wave speed

Answer 12

M/s = frequency (Hz) x wave length (m)

Question 13

Period ( time taken for a wave to pass a fixed point)

Answer 13

Period (s) = 1/frequency (hz)