Wat force is required to accelaret a car weighing 20,000N frm 30km/h to70km/h in 10 seconds?

Question

Wat force is required to accelaret a car weighing 20,000N frm 30km/h to70km/h in 10 seconds?

Answer 1

Calculate the acceleration of the car:

30km/h = 8.333 m/s

70km/h = 19.444m/s

v=u +at

19.444 = 8.333 + 10a

a = 11.111/10

a = 1.111m/s²

A car with a weight of 20,000N has a mass of 2000kg (taking g = 10m/s²)

F = m*a

F = 2000*1.111

F = 22,222.N

Answer 2

Accleration = (v2-v1)/time

= 40*1000/(60*60*10) m/sq. sec.

W = mg

m = w/g

=20000/g

F = ma

=20000/g * 40*1000/(60*60*10)

= 200000/9g

Putting g = 10 m/sq.sec

F = 20000/9 N