A cat has a mass of 5646g and a velocity of 4.5 m/s. What is its KE?

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Answer 1 · 2017-12-13T06:36:45

#KE ~~ 57.2 J#

Given: mass #= 5646 g; " "v = 4.5 m/s#

Find kinetic energy: #KE = 1/2 mv^2#

First you need to know the units of #KE#: Joules (#J#)

#1 J = (1 kg*m^2)/s^2# where mass is in units of #kg#

So, mass #= 5646 g = 5.646 kg#

#KE = 0.5 * 5.646 kg * (4.5 m/s)^2#

#KE = 2.823 kg * 20.25 m^2/s^2#

#KE ~~57.2 ( kg*m^2)/s^2#

#KE ~~ 57.2 J#