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## Homework Statement

1. What is the kinetic energy in joules of a 950-lb motorcycle moving at 50 mph ?

2. If the speed of the motorcycle changes from 50 mph (with kintic energy K1) to 25 mph (with kinetic energy K2), what is the ratio of K1 to K2?

## Homework Equations

1. KE=1/2mv2

The answer I got for this problem was 1.1×10 5 J

## The Attempt at a Solution

2.k1/k2= 0.25