Answer

a) i) the pull of the trailer on the car (1)

ii) 150 N backwards (1)

b) i) 130 N forwards (1)

ii) a = F / m (1) = 130 N / 190 kg (1) = 0.68 m s^-2 (1)

c) i) 0 (1)

ii) 150 N backwards (1)