Question

Total mechanical energy is equal to _____.
PE + KE
PE × KE
PE ÷ KE
PE - KE

Answer 1

Total mechanical energy is

potential energy plus genetic energy

The answer is the first choice

Answer 2

The total mechanical energy is equal to P.E+K.E.

(a) is correct.

Step-by-step explanation:

Potential energy :

Potential energy is the store energy and It is represents by U.

It is defined as:

`P.E= U =mgh`

Where, m = mass of the object

g = acceleration due to gravity

h =height

Kinetic energy :

Kinetic energy is defined as the energy of motion. It represents by K.

It is defined as:

`K.E = (1)/(2)mv^2`

Where, m = mass of the object

v = velocity of the object

According to law of conservation,

The total mechanical energy is the sum of the potential energy and kinetic energy is constant in time.

`T = P.E+K.E`

Hence, The total mechanical energy is equal to P.E+K.E.