Question

A rocket having fuel as its bulk is initially at rest. Neglecting the effect of gravity, when fuel is burning at a constant rate, acceleration a of the rocket with respect to time t is best represented by one of the graphs given below.

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Answer 2

Acceleration of a rocket is given by

a = $\frac{F}{\left( M_{0} - mt \right)}$

With the burning of fuel, mass of rocket decreases but engine keeps the force constant so acceleration is picket up in the manner shown in (1)