Question

What is the kinetic energy of a car weighing 3000 pounds traveling at 55 miles per hour

Answer 1

Kinetic energy is given by= (1/2)(mass of object)(speed of object)²

^{in given unit's}

^{Kinetic energy=}  (1/2)(3000pounds)(55 miles/hr)²

= 4537500 pounds miles/hr

In SI units

M= 3000 pounds= 1360.777 kg

V= 55 miles/hour= 88513.9/3600= 24.5871 m/s

Kinetic energy= (1/2)(1360.777)(24.5871)²

^{= 411315.3488 J}