Question

There is a bell at the top of a tower that is 45m high. The bell weighs 19kg. Calculator the energy.

Answer 1

If you are referring to the potential energy of the bell then the answer would be:

8,379 kg.m²/s² or 8,379 Joules

This is how it was solved:

Potential energy is stored energy in an object in relation to its position. In this case, we are talking about gravitational potential energy.

This can be solved with the equation:

$PE_{grav}= mgh$

Where:

PEgrav potential energy

m = mass

g = 9.8 m/s²

h = height

Now all you do is plug in what you know into the equation:

Given:

m = 19 Kg

g = 9.8 m/s² (This is the constant acceleration due to gravity on Earth)

h = 45 m

Solution:

$PE_{grav}= mgh$

$PE_{grav}= (19kg)(9.8m/s^{2})(45m)$

$PE_{grav}= 8,379kg.m^{2}/s^{2}$ or $8,379 Joules$