GCSE Questions: Forces

Q26.

(a) A car starts from rest and accelerates at 3m/s².

Calculate the velocity of the car after 4s.

a = Δv/t

Δv = at

Δv =3 x 4 = 12

Velocity after 4 seconds = 12 m/s

[3 marks]

(b) A roller coaster car moves down a slope with an acceleration of 5m/s².

The force on the roller coaster car is 4000N.

Calculate the mass of the roller coaster car.

F = ma

m = F/a

m = 4000/5

m = 800 kg

[3 marks]

[6 Marks TOTAL]