0mys. lind the minimum length of airport runway. the ground aft p from the top o

Question

0mys. lind the minimum length of airport runway. the ground aft p from the top of a building with an initial velocity of 30m/s. If it hits to er 7 seconds, find the height of building. a constant velocity of 10m/s. An object is released freely from that e ground after 20 seconds. Ignoring the air resistance, find the position 3. A balloon is rising with balloon and hits to the 20 secon of the balloon: a) at the time of object released b) at the time of object hits to the ground velocity of 4. The displacement function of an object is given x-5t2 +4t +3. Find the displacement, velocity and acceleration of that object at t-3sec. obsectisgivenast-2 Findthe acceleration, velocityand displacement of that object at t 3sec

Explanation / Answer

2.

Height of build will be given by:

H = U*t + 0.5*a*t^2

a = -g = -9.81 m/sec^2

U = initial velocity = 30 m/sec

t = 7 sec

So,

H = 30*7 - 0.5*9.81*7^2

H = -30.35 m

Height of building = 30.35 m

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