Question

The specific kinetic energy of a moving mass is given by ke = V2/2, where V is the velocity of the mass. Determine the specific kinetic energy of a mass whose velocity is 200 ft/s, in Btu/lbm.

Answer 1

Answer:

0.799Btu/lbm

Explanation:

Data given

velocity, v= 200ft/s

Since the formula to define the the kinetic energy is

$KE=v^{2}/2$

where v=velocity and the final answer expressed in Btu/lbm

we just substitute the value of the velocity into the equation and we arrive at

$KE=(200ft/s)^{2}/2\\KE=20,000ft^{2}/s^{2}$

Now we convert to Btu/lbm

since

$1 Btu/lbm=25,037ft^{2}/s^{2}$

then

$20000/25037\\=0.799Btu/lbm$

Hence the kinetic energy in is 0.799Btu/lbm