Question

# A jet airplain travelling at the speed of ( 500 mathrm{km} / mathrm{hr} ) ejects its products of combination at the speed of ( 1500 mathrm{km} / mathrm{hr} ) relative to jet plane. What is the speed of later wrt observer on the ground?

Solution

Let speed = 500km/hr

Work speed ( =x mathrm{km} / mathrm{hr} )

Relative speed ( =500+x ) [both in opposite direction]

So (,500+x=1500 )

[

x=1000 mathrm{km} / mathrm{hr}

]

Deposit direction SO, reject = - 1000km/hr