Forces: Equations

Question 1

Momentum

Answer 1

momentum = velocity x mass
p = m x v
(kg m/s = m/s x kg)

Question 2

Average Speed

Answer 2

speed = distance ÷ time
v = s ÷ t
(m/s = m ÷ s)

Question 3

Change in Momentum

Answer 3

force = (mass x change in momentum) ÷ change in time
F = m△v ÷ △t
(newtons = kg m/s ÷ s)

Question 4

acceleration

Answer 4

acceleration = change in speed ÷ time
a = △v ÷ s
(m/s² = △m/s ÷ s)

Question 5

constant acceleration

Answer 5

final velocity² - initial velocity² = 2 x acceleration x distance
v² - u² = 2as
(m/s - m/s = 2 x m/s² x m)

Question 6

force

Answer 6

force = acceleration x mass
F = am
(newtons = m/s²  x kg)