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Q.14

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 155

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Short Answer

A kg train applies its brakes with the intent of slowing down at a rate. What magnitude force must its brakes provide?

Magnitude of force (F) provided by brakes = .

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Step by Step Solution

Step 1 : Force : 

The force exerted on a mass that causes it to change velocity.

Step 2 : Explanation : 

The quantity of force exerted on an object is equal to the product of its mass and the acceleration generated, according to Newton's second equation of motion.

The object in this circumstance is a train that is slowing down by applying a brake.

Train mass ,

Acceleration's magnitude ,

Hence, by providing a force of magnitude , brakes reduce train speed.

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