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Chapter 36: Q. 20 (page 1059)

Jill claims that her new rocket is 100mlong. As she flies past your house, you measure the rocket鈥檚 length and find that it is only 80m What is Jill鈥檚 speed, as a fraction of c?

Short Answer

Expert verified

Jill have a speed0.6c

Step by step solution

01

Given Information

We have given that the length of the new rocket is 100m.

We need to find Jill鈥檚 speed.

02

Simply 

Consider:

L=100mL'=80m

using formula:

L'=L1-v2c2...(1)

Solve vcfrom equation (1)

L'=L1-v2c2L'L=1-v2c280100=1-v2c20.8=1-v2c20.64=1-v2c20.36=v2c20.6=vc鈬�v=0.6c

Jill's speed is 0.6cfrom speed of light

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