Joseph lifted a parcel from the floor. If he lifts the same parcel twice as high, then it will have:

A. twice its potential energy
B. thrice its potential energy
C. thrice its kinetic energy
D. twice its kinetic energy



Answer :

Let's analyze the situation step by step to determine the correct answer.

1. Understanding Potential Energy: The gravitational potential energy ([tex]\(PE\)[/tex]) of an object is given by the formula:
[tex]\[ PE = mgh \][/tex]
where:
- [tex]\(m\)[/tex] is the mass of the object
- [tex]\(g\)[/tex] is the acceleration due to gravity (approximately [tex]\(9.8 \, \text{m/s}^2\)[/tex])
- [tex]\(h\)[/tex] is the height above the ground

2. Initial Potential Energy: Assume the parcel has a certain mass [tex]\(m\)[/tex] and it was lifted to an initial height [tex]\(h\)[/tex].
[tex]\[ PE_{\text{initial}} = mgh \][/tex]

3. Final Potential Energy: Now, if the parcel is lifted to twice the initial height ([tex]\(2h\)[/tex]), the potential energy becomes:
[tex]\[ PE_{\text{final}} = mg(2h) = 2mgh \][/tex]

4. Ratio of Final to Initial Potential Energy: To find how many times the final potential energy is compared to the initial potential energy, we divide [tex]\(PE_{\text{final}}\)[/tex] by [tex]\(PE_{\text{initial}}\)[/tex]:
[tex]\[ \text{Ratio} = \frac{PE_{\text{final}}}{PE_{\text{initial}}} = \frac{2mgh}{mgh} = 2 \][/tex]

This tells us that if Joseph lifts the parcel twice as high, the potential energy of the parcel will be twice its initial potential energy.

Thus, the correct option is:
- Twice its potential energy