Paper 2

Question 1

Work done (a.k.a Energy transferred)

Answer 1

W = Fs
Work done (J) = Force(N) x Distance moved along the line of the force(m)

Question 2

Moment of a force

Answer 2

M = Fd
Moment(Nm) = Force(N) x Distance perpendicular to the line of the force(m)

Question 3

Distance

Answer 3

s = vt
Distance(m) = speed(m/s) x time(s)

Question 4

Acceleration

Answer 4

a = Δv/t
Acceleration(m/s{2}) = Change in velocity(m/s)/time taken(s)

Question 5

Resultant Force

Answer 5

F = ma
Resultant force(N) = mass(kg) x acceleration(m/s{2})

Question 7

Weight

Answer 7

W = mg
Weight(N) = mass(kg) x gravitational field strength(N/kg)

Question 8

Momentum

Answer 8

p = mv

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

Question 8

Force applied to a spring

Answer 8

F = ke
Force(N) = spring constant(N/m) x extension(m)

Question 9

Pressure

Answer 9

p = F/A
Pressure(Pa) = Force(N)/Area(m{2})

Question 10

Wavespeed

Answer 10

v = fλ
Wavespeed(m/s) = frequency(Hz) x wavelength(m)