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Q. 2

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 227

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Short Answer

At what speed does a 1000 kg compact car have the same kinetic energy as a 20,000 kg truck going 25 km/h?

The speed should be 11.8 km/hr.

See the step by step solution

Step by Step Solution

Step1: Given information

20,000 kg truck going 25 km/h.

Mass of car is 1000 kg .

Step2: Explanation

The kinetic energy is calculated by

KE =1/2 (mv2) ....................................(1)

Use equation (1) to calculate the kinetic energy of car and truck and equate them

As given kinetic energy for car and truck is equal, so,

K.Ecar = K.Etruck

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