Question

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.

Answer 1

Answer:-81.29 J

Step-by-step explanation:

Given

mass of ball
`m=2.35 kg`

Length of string
`L=3.53 m`

height of Room
`h=5.03 m`

Gravitational Potential Energy is given by

`P.E.=mgh`

where h=distance between datum and object

here Reference is ceiling

therefore
`h=-3.53 m`

Potential Energy of ball w.r.t ceiling

`P.E.=2.35* 9.8* (-3.53)=-81.29 J`

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