there is a bell tower at the top of a tower that is 50 m high. the bell weighs 190N. the bell has___ energy. calculate it.
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Answer:
The bell has 8550 J energy. given, There is a bell at the top of a tower
that is 45 m high. The bell weighs 190 N
i.e., bell is located at the top of tower, h = 45m
weight of the bell, F = 190N
work done by the gravitational force = F.cos 180° [ gravitational force (i.e., weight) acting
downward while body is located 45m above the ground. so, angle between force and h = 180°]
work done by the gravitational force = 190 x 45 x (-1)
= -8550 J
we know, potential energy = negative of work done
= -(-8550 J) = 8550 J
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Given :
height = 50 m
weight of bell = 190N
To Find :
energy of bell
The bell has an energy of 8550 J.
provided, There is a bell at the summit of a 45-meter-high tower. The bell is 190 N in weight.
i.e., the bell is at the top of the tower, with a height of 45 meters .
F = 190 N is the bell's weight.
F.hcos180° work done by gravitational force
[A downward gravitational force (i.e., weight) operating on a body that is 45 meters above the earth. as a result, the angle between force and h is 180°]
= 190 × 45 × (-1)
-8550 J =
We all know that potential energy equals negative work done.
= -(-8550 J) = 8550 J
Therefore the the bell has 8550 J energy.
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