Question

A rocket is launched upward from the earth surface whose velocity time graph shown in the figure.Then maximum height attained by rocket

Answer 1

Answer: option (4) 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

[ note : rocket starts from rest and moves upwards with increasing speed at 20sec , after 20sec rocket decreases its speed continuously, at point B e.g., t = 120 sec speed of rocket becomes zero. so, now rocket starts to fall downwards. but question asked we have to find maximum height attained by rocket , so just require to find the distance travelled by rocket unless it becomes rest in upward motion,e.g, t = 120sec . that’s why we find area enclosed by graph at point B. ]

Answer 2

Explanation:

in first diagram it is the graph given in the question and in the second diagram it is the explanation of the graph hope it helps you and mark it is brainiest if you are satisfied by my response