Kinetic energy = 1/2 * mass * velocity squared or K.E. = mv^2/2 KE = 1/2 * 91,000 * 5 squared = 1137500 J = 1.14 MJ (3s.f.)
I think you might know , But anyway I'm mentioning that Kinetic energy for any body(which can be treated as a particle) is half the product of it's mass and square of magnitude of velocity. Though we can't consider a bulldozer as a point mass (particle), we generally do so (Or else you can't find K.E.) and calculate K.E. as K.E. = [m*v?]/2 = (91000*25)/2 = 387500 Joule.
k e= 1/2 m v squared the velocid is 5meters per second the mass is 91,000 kg the units are fine i hope this helps , as i would be doing you a disservice if i did your homework, rather than help you with it
