A car and a truck are moving with same K.E. on a straight road. Their engines

A car and a truck are moving with same K.E. on a straight road. Their engines are simultaneously switched off which one will stop in lesser distance?

Posted by: - Inna
Posting Time: - 7/17/2015 1:27:05 AM
Subject: - Physics

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Best 5 Answers:-

Answer by:- Serley

Let the mass of the car = m and mass of the truck = M
Let the velocities of the car and truck is v and V respectively.
Given the kinetic energy of car = kinetic energy of truck
Or, ½ mv^2 = ½ MV^2 or, mv^2 = MV^2
Since M>m, therefore v>V.
Also, Normal force on truck is greater than the car so is the friction force.
Thus, the truck will stop in lesser distance.

 
   

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