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Which runner has greater kentic energy : a 46-kilogram runner moving at a speed of 8 meters per second or a 92-kilogram runner moving at a speed of 4 meters per second?
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Which runner has greater kentic energy : a 46-kilogram runner moving at a speed of 8 meters per second or a 92-kilogram runner moving at a speed of 4 meters per second?

User StatsStudent
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1 Answer

8 votes

Answer: First runner has more kinetic energy

Step-by-step explanation:

The formula for kinetic energy is defined to be:


KE=(1)/(2) mv^2

Plug in the value for each runner to get:


KE_1=0.5(46kg)(8m/s)^2=1472J


KE_2=0.5(92kg)(4m/s)^2=736J

User Fariz Azmi
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