A 2000 kg car travels at a speed of 20m/s. Find its kinetic energy?

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Answer 1 · 2018-05-03T15:52:44

#KE = 4.0*10^5 J#

Kinetic Energy is #KE = 1/2 mv^2#

where m = mass and v = velocity

#m= 2000kg#
#v= 20m/s#

#KE = 1/2(2000kg)(20m/s)^2#

#KE =1000kg(400m^2/s^2)#

#KE = 400,000(kg*m^2)/s^2#

#(kg*m^2)/s^2= J#

#J =# Joues a measure of Heat Energy

#KE = 4.0*10^5 J#