An object has a kinetic energy of 25 j and a mass of 34 kg, how fast is the object moving?

1 Answer
Feb 18, 2018

KE = 1/2 mv^2KE=12mv2., rearrange the question and solve for velocity

Explanation:

In this case, KE = 1/2 mv^2->25J=1/2*34kg*v^2KE=12mv225J=1234kgv2

Then , 50J=34kg*v^250J=34kgv2

v^2={50kg*m^2/s^2}/{34kg}v2=50kgm2s234kg

I'll let you finish the problem. Your units will be in m/s. Also, since the problem is asking for speed and not velocity, use the positive square root.