How to calculate the total amount of mechanical energy ?

To calculate the total amount of mechanical energy, you need to add the potential energy and kinetic energy of the system. The formula for mechanical energy is:

Mechanical Energy = Potential Energy + Kinetic Energy

Potential Energy (PE) is calculated using the formula:

PE = mgh

where:
m = mass of the object
g = acceleration due to gravity (9.81 m/s^2)
h = height of the object above a reference point

Kinetic Energy (KE) is calculated using the formula:

KE = 0.5 * m * v^2

where:
m = mass of the object
v = velocity of the object

Once you have calculated the potential energy and kinetic energy, you can add them together to find the total mechanical energy of the system.