Question

A car changes its speed from 20 km h-1 to 50 km h-1 of mass 3600 kg in 5 s. determine the net external force applied on the car.

Answer 1

u=20km/hr
v= 50km/hr
mass= 3600kg
t= 5s

Acceleration= (v-u) /t= (50-20)/5=30/5= 6m/s2

According to the formula,
F=mass *acceleration
= 3600*6
= 21600N !!! ANSWER!!!
Mark BRAINLIEST And if possible FOLLOW

Answer 2

Answer:

6000N

Step-by-step explanation:

Given,

Initial velocity ( u ) = 20 Kmh-1

Final velocity ( v ) = 50 kmh-1

Mass ( m ) = 3600 Kg

Time ( t ) = 5 s

Formula :

F = ma

F = m ( v-u / t )

Apply it

F = 3600 ( 50 - 20 / 5 )

F = 3600 ( 30/5 )

F = 3600 ( 6 )

F = 21600 Kg Kmh-1

Units are not in S.I system ( ms-1 )

So,

Have to multiply this by 5/ 18

21600 * 5/18

1200 * 5

6000 Kgms-1 (or) 6000 N

This is the answer!!!!