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At What Speed is the Kinetic Energy the Same?

At what speed does a 1300 kg compact car have the same kinetic energy as a 1.8×104kg truck going 22 km/hr?

Known variables:

mass (m1): 1300kg

v2=22km/hr

m2=  1.8e4

1/2mv2 = 1/2mv2

(1300kg)(?)2 = (1.8e4)(222)

(?)2=8712000/1300

Solve for the Unknown

(?)= 6701.53

√6701.53

Vc= 82 km/hr

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