Question

(Newton's Law of Motion) A car whose mass including the driver is 1600 kg has a maximum acceleration of 1.2 m/s^2. If three 80 kg passengers are also in the car, find its maximum acceleration then.

Answer 1

F=ma
=1600(1.2)
=1920N

with the same force:
1920=(1600+3x80) a
a=1920/1780
=1.08ms^-2