Some enterprising physics students working on a catapult decide to have a water balloon fight in the school hallway. the ceiling is of height 3.6 m, and the balloons are launched at a velocity of 11 m/s. the acceleration of gravity is 9.8 m/s 2 . at what angle must they be launched to just graze the ceiling?

angle above the horizontal.

Step by Step Solution :

Given :

Launch speed = 11 m/sec

Height of the ceiling = 3.6 m

Calculation :

Let be the launch angle, measured above the horizontal.

Vertical component of initial speed is

We know that

angle above the horizontal they launched to just graze the ceiling.

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v 154.9= 0.9 length length s little over 154.9cm

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: