Question

An object has mass of 50 kg is raised to a height 9 m . Calculate potential energy

Answer 1

ANSWER:

• The potential energy of the body = 4410 J.

GIVEN:

• An object has mass 50 kg is raised to a height 9 m.

TO FIND:

• The potential energy of the body.

EXPLANATION:

POTENTIAL ENERGY:

• Potential Energy is the energy possessed by a body by virtue of its rest.

P.E = Final work done - Initial work done

★ P.E = mgh₂ - mgh₁

◈ m = 50 kg

◈ g = 9.8 m/s²

◈ h₁ = 0 m

◈ h₂ = 9 m

➳ P.E = 50(9.8)(9) - 50(9.8)(0)

➳ P.E = 450(9.8) - 0

➳ P.E = 450(9.8)

➳ P.E = 4410 J.

Hence the potential energy of the body = 4410 J.

EXTRA DEFINITION:

KINETIC ENERGY:

• Kinetic Energy is the energy possessed by a body by virtue of its motion.

• K.E = 1/2 mv²