Question

A small jet is flying with a speed of 70 m/s at a height of 1000 m and has a mass of 1000 kg. What is the total mechanical energy of the jet?

Answer 1

`12.45 xx 10^6 J`

Explanation:

Total energy is given by the sum of gravitational potential energy (Ew) and Kinet energy (Ek)
`E_t= E_w+ Ek= m xx g xxh + 1/2 m v^2 = 1000Kg xx 10 m/s^2xx 1000m+ 1/2 1000kg (70m/s)^2= 1 xx 10^7 J + 2.45 xx 10^6 J =12.45 xx 10^6 J`