Question

A car accelerates from 0-30m/s in 5 s. It has a mass of 1200kg. What force does the engine produce? *

A) 36000N
B) 7200N
C) 60000N
D) 2000N
include explanation please

Answer 1

a = ?

u = 0

v = 30

by using v = u + at equation we can find " a "

30 = 0 + 5a

6 m/s = a

by using f = ma equation we can find force produce by engine ,

f = ?

a = 6

m = 1200

f = 1200 × 6

f = 7200 N

so the answer is "B"