Question

Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50meters above the surface.

1080 J
2 00 J
1 00 J
10. J

Answer 1

1080J

Step-by-step explanation:

Given parameters:

Mass of object = 2kg

Velocity = 10m/s

Height = 50m

Unknown:

Total energy = ?

Solution:

The total energy of the moving object is obtainable by summing the kinetic and potential energy;

Total energy = P.E + K.E

P.E is the potential energy = mgh

K.E is the kinetic energy =
`(1)/(2)`mv²

Now insert the parameters and solve;

Total energy = mgh +
`(1)/(2)`mv²

m is the mass

g is the acceleration due to gravity

h is the height

v is the velocity

Total energy = (2 x 9.8 x 50) + (
`(1)/(2)` x 2 x 10²)

Total energy = 980 + 100 = 1080J