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

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 (?)2 = 6701.53 √6701.53 Vc= 82 km/hr