paper 2 : equations

Question 1

how do you calculate weight

Answer 1

weight = mass x gravitational field strength (W=mg)

Question 2

how do you calculate work done

Answer 2

work done = force x distance along the line of action of the force (W=Fs)

Question 3

how do you calculate the moment of a force

Answer 3

moment of a force = force x distance from normal to direction of force (M=Fd)

Question 4

how do you calculate pressure

Answer 4

pressure = force normal to a surface / area of surface (p=F/A)

Question 5

how do you calculate distance

Answer 5

distance = speed x time (s=vt)

Question 6

how do calculate acceleration

Answer 6

acceleration = change in velocity / time taken (a=Δv/t)

Question 7

how do you calculate resultant force

Answer 7

resultant force = mass x acceleration (F=ma)

Question 8

how do you calculate wave speed

Answer 8

wave speed = frequency x wavelength (v=fλ)

Question 9

how do you calculate the force applied to a spring

Answer 9

force applied to a spring = spring constant x extension

F=ke

Question 10

what is spring constant measured in

Answer 10

spring constant is measured in metres