Question

The first stage of the rocket launches a satellite to a height of 50 km and velocity attained is 6000 kmh^-1 at which point its fuel exhausted. How high the rocket will reach?

• A. 138.9 km
• B. 188.9 km
• C. 88.9 km
• D. 168.9 km

Answer 1

Answer: (B)

188.9 km

Answer 2

h = (v²/2g) + 50 km

= $\frac { ( 5000 / 3 ) ^ { 2 } } { 20 \times 1000 } + 50 = 188.9 \mathrm {~km}$