Question

A truck is moving with a speed of 15 m/s. Truck driver applied brakes suddenly and brings

the truck to rest in 5 seconds. Find retarding Force on the truck if the total Mass of the truck is

400 kg.​

Answer 1

Explanation:

given,

mass= 400kg

time= 5sec

u= 15m/s

v= 0

Force = m×a

we dont know acceleration we must find it

accodring to 1st eq. of motion

v = u+ at

0= 15+5×a

-15= 5a

-3= a

hence retardarion is 3

force= m×a

= 400×3

= 1200N

Force on the truck acting is 1200N

.....666....