What formula do you use to solve this?

Question

A net force of 3000 N accelerated a car from rest to 36 km/h in 5 s. whats the mass of the car? Whats the weight of the car?

Answer 1

f=ma

force=mass*acceleration

DONT FORGET to change the km/h into m/s!

w=mg

weight=mass*gravity

gravity is 9.8

Answer 2

Force = Mass X Acceleration

Newton's laws of motion.

Force is given as 3000 N

Acceleration is given for 5s

You get the mass. Then to get the actual weight you need to multiply the mass with 9.82 (force of gravity).

Answer 3

ans) mass of the car=1500 kg

weight of the car=14700 N

using general law of motion,we get,

v=u + at

putting the values,we get,a=2 m/s

using newton's law of motion,F=ma

on solving,

m=1500 kg

weight=mg

=1500*9.8 N

=14700 N