Question

A flower pot sits on a window 4m above the ground?

A. If it has a mass of 5kg, how much energy does it have?

B. what will the potential energy of the flower be if it falls to a height of 2m?

C. how much kinetic energy will it have at 2m?

D. how fast will it be moving?

Answer 1

Explanation:

A) when bird is on height 4 m it has energy mgh = 5 *10*4 = 200joules

B) at height 2m energy will be 100 joules.

C) at height 2m kinetic energy is also 100 joules as at that time bird have some speed.

D)it's speed 1/2 mass * velocity = 100

5* velocity = 200

this implies velocity = 40 m/s..

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