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Chapter 36: Q. 4 (page 1059)

A baseball pitcher can throw a ball with a speed of 40m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 10m/s. What is the speed of the truck?

Short Answer

Expert verified

The speed of the truck is30m/s.

Step by step solution

01

Given information

We have given,

Ball speed with respect to ground =40m/s

Ball speed with respect to truck =10m/s

We have to find out the speed of the truck.

02

Simplify

since, we know that when object is moving with respect to some rest body then its origin speed will be greater than in when it is on moving frame.

then,

vtruck=vb-vtbvtruck=40-10vtruck=30m/s.

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