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#1: A helicopter drops a 20 kg package from rest at a height of 120 m from the ground.
a) How much initial potential energy is stored by the package?
b) What is the kinetic energy of the package just before it hits the ground?
c) What is the speed of the package just before it hits the ground?

Verified Answer :

GinnyAnswer

Final answer:

The initial potential energy, kinetic energy just before hitting the ground, and the speed of the package just before impact are calculated using relevant physics formulas.


Explanation:

a) Potential Energy: The initial potential energy of the package is calculated using the formula PE = mgh, where m = 20 kg, g = 9.81 m/s^2, and h = 120 m.

b) Kinetic Energy: The kinetic energy just before hitting the ground is equal to the initial potential energy.

c) Speed: The speed just before hitting the ground can be found using the equation for kinetic energy KE = 0.5mv^2.


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