Answer:
120,000 J
Explanation:
The work done by a force applied parallel to an object is given by:

where
F is the magnitude of the force applied
d is the displacement of the object
In this problem:
F = 8000 N is the force exerted by the elevator to lift the passenger
d = 15 m is the displacement of the elevator
Therefore, the work done in this situation is

So, the work done is 120,000 J.
Answer:
Melon
Explanation:
The melon will hit the ground first because it has a greater mass and therefore greater gravitational pull than the pomegranate, which weighs less.
Answer:
A pendulum is weight suspended from a pivot so that it can swing freely
Answer:
Gravitational potential energy (GPE) = 107.8J
Explanation:
Gravitational potential energy (GPE) = mgh
Where mass(m) = 11kg
Acceleration due to gravity(g) = 9.8m²/s
height = assumed to be 1m
Force(F) = mg
Force(F) = 11×9.8 = 107.8N
Gravitational potential energy (GPE) = 107.8×1
= 107.8J