Question

A rocket is launched upward from the Earth's surface whose velocity-time graph is shown in figure.
Height covered by the rocket before retardation is:

• A. $1km$
• B. $10km$
• C. $20km$
• D. $60km$

Answer 1

The correct option is D $60km$

Step-by-step explanation:

here graph is given,

maximum height is attained by rocket = area enclosed by part of graph which is above the x - axis.

= area of triangle OAB

= 1/2 * OB * altitude AT

= 1/2 × 120 seconds × 1000 m/s

= 60 × 1000 m = 60 km

hence, height attained by rocket is 60km