Three identical objects are thrown from the top of a tall building with the same

Question

Three identical objects are thrown from the top of a tall building with the same initial speed and at the same instant. Object #1 is thrown at an angle theta above the horizontal, object #2 is thrown horizontally, and object #3 is thrown at an angle theta below the horizontal.

A) object #1 will reach the ground with the fastest speed B) object #2 wil reach the ground with the fastest speed C) object #3 will reach the ground with the fastest speed D) all 3 objects will reach the ground at the same moment E) none of the above

Explanation / Answer

Here ,

if there is same initial velocity ,

using conservation of energy

final kinetic energy = intial potential energy + initial potential energy

as initial kinetic energy and potential energy is same for both the objects

all the objects will have same speed ,

but the time taken for the object to reach the ground will be different

E) none of the above

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