Question

a rocket is fired vertically from the ground it moves upwards with a constant acceleration 10 metre per second after 30 second the fuel is finished after what time from the instant of firing the rocket will attain the maximum height​

Answer 1

Answer:

T= 1 sec.

Explanation:

Bro I think in the above question, 10 is velocity as the unit you have used is m/s.

According to that,

Y= 10 t - 1/2*10*t^2

Y = H = u^2 * sin^2 theta/2 * 10 = 5 m

Therefore, quadratic eq is

t^2 - 2t +1 = 0

T = 1 sec.

Hope it helps you.

Mark as brainliest.

Answer 2

Answer:

60secs

Explanation:

It got acc with 10m/s² for 30 sec and archived some value of Velocity and now it will decelerate with g=10m/s² so it will still take 30 secs to decrease its Velocity to zero and maximum height is achieved when Velocity becomes zero and after that time it will start to free fall towards ground and hence its maximum height is achieved at 60 secs