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A 7 kg box slides down a long, frictionless incline of angle 28° . It starts from rest at time t = 0 at the top of the incline at a height 27 m above the ground. What is the original potential energy of the box relative to the ground? The acceleration due to gravity is 9.81 m/s 2 . Answer in units of J.

Respuesta :

Answer:

Original potential energy will be 1852.2 J

Explanation:

We have given mass of the box m = 7 kg

Height from the ground h = 27 m

Acceleration due to gravity [tex]g=9.8m/sec^2[/tex]

We have to find the original potential energy

We know that potential energy is given by

[tex]PE=mgh=7\times 9.8\times 27=1852.2J[/tex]

So original potential energy will be 1852.2 J

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