Question

Why are mulistage rockets used?

• A. Reduce air friction
• B. Reduce cost of the project
• C. To reduce the time of flight
• D. To improve the performance of the guidance system

Answer 1

Answer: (A), (B)

The correct options are
A Reduce air friction
B Reduce cost of the project

Air near the earth's surface is dense and hence, it is desired to keep low speed for the rockets in this region. Rockets are made to make a vertical ascent near the ground at low speeds. At higher elevations, parts of the rockets where the fuels are exhausted are discarded and the guidance system comes into play after this.