Answer:
Mechanical energy = 429.984J
Explanation:
Given the following data;
Mass = 7.2kg
Velocity = 2.4m/s
Height = 5.8m
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
First of all, we would determine the values of K.E and G.P.E
K.E = ½mv²
K.E = ½*7.2*2.4²
K.E = 3.6*5.76
K.E = 20.736 J
P.E = mgh
We know that acceleration due to gravity is equal to 9.8m/s²
P.E = 7.2*9.8*5.8
P.E = 409.248
Substituting the values into eqn 1, we have;
Mechanical energy = 20.736 + 409.248
Mechanical energy = 429.984J
