Calculate the mechanical energy TMEj of a 7.2 kg object moving at 2.4 m/ s and positioned 5.8m above the ground.

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

the answer is a)

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