Answer:
Force on the car will be 4800 N and time required to cover this distance 13.75 sec
Explanation:
We have given mass of the car = 1200 kg
Initial velocity u = 20 km/h
Final velocity v = 75 km/h
Acceleration [tex]a=4m/sec^2[/tex]
From the first equation of motion we know that
v = u+at, here v is final velocity, u is initial velocity, a is acceleration and t is time
So [tex]75=20+4\times t[/tex]
t = 13.75 sec
From second law of motion we know that [tex]F=ma[/tex]
So force [tex]F=1200\times 4=4800N[/tex]
