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A 2.35 kg ball is attached to a ceiling by a3.53 m long string. The height of the room is5.03 m .The acceleration of gravity is 9.8 m/s2.
What is the gravitational potential energyassociated with the ball relative to the ceiling?Answer in units of J.

Respuesta :

Answer:-81.29 J

Explanation:

Given

mass of ball [tex]m=2.35 kg[/tex]

Length of string [tex]L=3.53 m[/tex]

height of Room [tex]h=5.03 m[/tex]

Gravitational Potential Energy is given by

[tex]P.E.=mgh[/tex]

where h=distance between datum and object

here Reference is ceiling

therefore [tex]h=-3.53 m[/tex]

Potential Energy of ball w.r.t ceiling

[tex]P.E.=2.35\times 9.8\times (-3.53)=-81.29 J[/tex]

i.e. 81.29 J of Energy is required to lift a ball of mass 2.35 kg to the ceiling    

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