Question

A work of 16000 joules is done on a load of mass of 60 kg to lift a certain height calculate the height through which it is lifted (g=9.8 m/s^2) ​

Answer 1

Answer:

Work,W=mgh

h=

mg

W

=

20×9.8

784

=4m

Answer 2

Given :

Work done = 16000J

Mass of the object = 60 kg

Gravitational field = 9.8 m/s²

To find :

The height through which it is lifted.

Solution :

Potential energy is energy due to position.

• Potential energy is scalar quantity having magnitude.
• Sl unit of P.E is Joules.
• CGS unit of P.E is erg.

Potential energy of an object is given by

P.E = mgh

where,

• P.E denotes potential energy.
• m denotes mass.
• g denotes gravitational field.
• h denotes height.

Substituting all the given values in the formula,

➠ P.E = mgh

➠ 16000 = (60)(9.8)(h)

➠ 16000 = 588h

➠ h = 16000/588

➠ h = 27.21m $⠀$

thus, the height through which it is lifted is 27.21 m.