Question

A truck is moving with speed of 54 km/h. Truck’s driver applied brakes suddenly and brings the truck to rest in 5 sec. What is the average retarding force on truck, if the mass of the truck and driver is 400 kg?


Kindly answer as soon as possible :)

Answer 1

Answer:

hi SHREYA,

here is ur answer

Explanation:

initial velocity of the moving truck= 54Km/h=54*5/18 =15m/s.

time taken= 5s.

final velocity of the truck= 0m/s.

acceleration = ?

using formula, v = u+at

0 = 15 +a*5

-15 = 5a

a = -3 m/s

now,

mass of truck = 400 Kg

using formula, F=ma

F= 400*-3

F= -1200 N

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