Question

an object with a mass of 70 kilograms is supported at a height 8 meters above the ground . whats the potential energy of the object with respect to the ground?....A...560 J ...B... 3,430 J...C...5,488.... D...2,058 J

Answer 1

using the formula E = m* g*h the answer is C...5,488 J. BTW m is mass g is gravitational pull ( 9.8 )and h is height above ground

Answer 2

As per the question the mass of the object is given as 70 kg.

The height of the object from ground is 8 m.

We are asked to calculate the potential energy of that object.

The potential energy of a object is the energy gained by the body due to its position or configuration. The energy due to the position of object from the surface is called gravitational potential energy .

If a body of mass m is at a height of h from the ground,then its potential energy is calculated as -

                               potential energy $[P.E]= mgh$

where g is the acceleration due to gravity.

    we have been given h= 8 m and m= 70 kg

we know that acceleration due to gravity g =9. 8 m/s^2

                                        ⇒$P.E =70 kg *9.8 m/s^2*8 m$

                                                    =5488 Joule

Here Joule is the unit of energy.