Explanation

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I dropped ⇒ initial velocity =0

 time will be given by h=12gt2

t=√2hg=√2×20 m10 m/s2=2 sec

II both reaches simultaneously be so ti,e taken by IInd stone will be 

2 sec−1 sec=1 sec

or t′=1 sec

putting it in h=ut'+12gt2

& h=20 m,g=10m/s2

20=u×1+5×1

u=15 m/s

Explanation

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Explanation

If the speed is constant then no force is acting in the tangential direction.

Only force acting is perpendicular to the direction of velocity.

Hence, the work done will be zero.

Explanation

Management of airports is the primary duty of Airport managers

Airport managers oversee the daily activities at airports, assuring regulations are followed, safety is maintained and jobs are completed on time.

managers also act as the director of airport security.

Explanation

 the most negative impact on take-off performance is Hot and humid

On a hot and humid day, the aircraft will accelerate more slowly down the runway, will need to move faster to attain the same lift, and will climb more slowly.