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Chapter 6: Q.14 (page 155)

A 2.0脳107 kg train applies its brakes with the intent of slowing down at a 1.2m/s2 rate. What magnitude force must its brakes provide?

Short Answer

Expert verified

Magnitude of force (F) provided by brakes =2.4脳107N.

Step by step solution

01

Force : 

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

02

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.

F=ma

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

Train mass m=2.0脳107kg,

Acceleration's magnitude a=1.2m/s2,

F=maF=2脳107脳1.2F=2.4脳107N

Hence, by providing a force of magnitude 2.4脳107N, brakes reduce train speed.

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