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

$KE = 4.0*10^5 J$