# Aperson places an object on the shelves. 1. at which location on the shelves (w, x, y,

###### Question:

## Answers

an 8 kg book at a height of 3m

Explanation:

Potential energy is the energy possessed by an object by virtue of its position.

[tex]P.E=m\times g\times h[/tex]

m= mass of object = 200 kg

g = acceleration due to gravity = [tex]10ms^{-2}[/tex]

h = height of an object

1. an 8 kg book at a height of 3m

[tex]P.E=8kg\times 10ms^{-2}\times 3m=240Joules[/tex]

2. an 5 kg book at a height of 3 m

[tex]P.E=5kg\times 10ms^{-2}\times 3m=150Joules[/tex]

3. an 5 kg book at a height of 2 m

[tex]P.E=5kg\times 10ms^{-2}\times 2m=100Joules[/tex]

4. a book at a height of 2 m

[tex]P.E=0kg\times 10ms^{-2}\times 3m=0Joules[/tex]

Thus a 8 kg book at a height of 3 m has most potential energy.

an 8 kg book at a height of 3m

Explanation:

Potential energy is the energy possessed by an object by virtue of its position.

[tex]P.E=m\times g\times h[/tex]

m= mass of object = 200 kg

g = acceleration due to gravity = [tex]10ms^{-2}[/tex]

h = height of an object

1. an 8 kg book at a height of 3m

[tex]P.E=8kg\times 10ms^{-2}\times 3m=240Joules[/tex]

2. an 5 kg book at a height of 3 m

[tex]P.E=5kg\times 10ms^{-2}\times 3m=150Joules[/tex]

3. an 5 kg book at a height of 2 m

[tex]P.E=5kg\times 10ms^{-2}\times 2m=100Joules[/tex]

4. a book at a height of 2 m

[tex]P.E=0kg\times 10ms^{-2}\times 3m=0Joules[/tex]

Thus a 8 kg book at a height of 3 m has most potential energy.

￼C.A 30 kg suitcase at a height of 2 m ￼

Explanation:

The gravitational potential energy (GPE) of an object is given by:

[tex]U=mgh[/tex]

where

m is the mass

g is the gravitational acceleration

h is the heigth above the ground

We can use the formula to calculate the GPE of each object:

￼A.A 30 kg suitcase at a height of 1.5 m

[tex]U=(30 kg)(9.8 m/s^2)(1.5 m)=441 J[/tex]

￼B.A 20 kg suitcase at a height of 2 m

[tex]U=(20 kg)(9.8 m/s^2)(2 m)=392 J[/tex]

￼C.A 30 kg suitcase at a height of 2 m ￼

[tex]U=(30 kg)(9.8 m/s^2)(2 m)=588 J[/tex]

D.A 20 kg suitcase at a height of 1.5 m.

[tex]U=(20 kg)(9.8 m/s^2)(1.5 m)=294 J[/tex]

So, we see that the object which has the most GPE is C.

a) an airplane in mid-flight

Explanation:

The gravitational potential energy is defined by

[tex]E_{potential} =m*g*h[/tex]

where m is the mass of the object;

g is the gravitational acceleration;

an h is the height of the object;

For the examples, the highest value in potential energy will be for the airplane, because it has the more mass and the higher altitude by far in relation to the baseball or the bird.

D

Explanation:

its the heaviest so i would assume its D

d a 15 kg at a height of 0.8

D, a 15kg computer at 0.8m

Hi, we can do a comparisson. Recall that potential energy is defined as m*g*h where m is the mass in kg, g is gravitational acceleration (9.8m/s^2) and h is the height therefore:

A:B:C:D=30×g×1.5:20×g×2:30×g×2:20×g×1.5 since all of them have the term of g, we can "kill" the term hence we have that:

A:B:C:D=45:40:60:30 hence we know the option c has the most potential energy

I think A is the correct answer because its high is more higher compared to the others, and the mass really does not matter, to know the gravitational potential energy, we need to know how high the object is located because gravity does not show any favor to an object that has more mass or an object that doesnt

PE = mgh, so you're looking for the heavier object higher up.

Multiply the given mass and height to see which is more.

A. (30)(1.5) = 45

B. (20)(2) = 40

C. (30)(2) = 60

D. (20)(1.5) = 30

So C has the most gravitational potential energy

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explanation:

the answer is