could you help with number 3?
pls and thank you

It's two separate questions, one for each car. Use F=mA to solve both of them.
a). the 1,000 kg car
A = F/m
A = 1000N / 1000kg
A = 1 m/s²
b). the 2,000 kg car
A = F/m
A = 1000N / 2000kg
A = 1/2 m/s²