A rocket is launched with velocity 10 km/s. If the radius of earth is

1.	A rocket is launched with velocity 10 km/s. If the radius of earth is R, then maximum height attained by it will beA) 2RB) 3RC) 4RD) 5R
Answer» C) 4R Explanations: If body is projected with velocity V(V < Ve) then height upto where it rises h = [R/{(V_e²/V²)}] = [R/{(11.2/10)² - 1}] ........v_e = 11.2 km/s h = 3.93 R h ≈ 4R

A rocket is launched with velocity 10 km/s. If the radius of earth is R, then maximum height attained by it will beA) 2RB) 3RC) 4RD) 5R

Answer»

C) 4R

Explanations:

If body is projected with velocity V(V < Ve) then height upto where it rises

h = [R/{(V_e²/V²)}]

= [R/{(11.2/10)² - 1}] ........v_e = 11.2 km/s

h = 3.93 R

h ≈ 4R

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A rocket is launched with velocity 10 km/s. If the radius of earth is R, then maximum height attained by it will beA) 2RB) 3RC) 4RD) 5R

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