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SVETLANKA909090 [29]
3 years ago
5

When is the only time that an object has no gravitational potential energy

Physics
2 answers:
Rom4ik [11]3 years ago
5 0
When it is not moving or on the ground
Aleksandr [31]3 years ago
4 0

Answer:

The gravitation potential energy of an object will be zero when it will be at ground.

Explanation:

The energy of an object due to its position is known as gravitational potential energy. Mathematically, it can be written as:

                                        P.E = mgh          ………… (i)

Equation (i) shows that P.E depends upon weight and height of the object above the ground. If h = 0 then,  

                                         P.E = mg(0)

                                           P.E = 0  

Hence, when the object will be at ground, its potential energy will be zero.

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Mary starts from her house, walks 80 meters south, and stops to chat with her aunt on the sidewalk. After chatting for a few min
Vaselesa [24]
The average speed will be:
Total distance travelled divided by time taken
Total distance (in metres)= 80+125+45=250
Total time (minutes) =10
250/10
=25
Thus Mary's average speed is 25 metres per minute.
6 0
4 years ago
Read 2 more answers
The ____ of emitted light depends directly on the energy between the two orbits and this determines the color of the light
Anna007 [38]

The <u>frequency</u> of emitted light is directly proportional to the energy between the two orbits and this determines the color of the light.

<h3>What is light?</h3>

Light can be defined as a form of electromagnetic waves that does not require any medium for its propagation. This ultimately implies that, light is a form of wave that is generally referred to as a visual signal because it can be seen with the eyes.

According to the model of light wave, the <u>frequency</u> of emitted light is directly proportional to the energy between the two orbits and this determines the color of the light.

<em>In conlcusion, the </em><u><em>frequency</em></u><em> of emitted </em><em>light</em><em> is highly dependent on the </em><em>energy</em><em> between the two (2) </em><em>orbits</em><em>.</em>

Read more on energy here: brainly.com/question/1242059

7 0
3 years ago
which of these statements best explains why the difference between summer and winter temperatures is greatet in Russia thanin FL
MaRussiya [10]
I don't know your statement, but one explanation for this is that Russia is mostly located on land, away from water and Florida is surrounded by water.

Water takes up the heat from the environment, so it has the effect of making the temperatures of objects around it milder: cooling down when hot, warming up when too cold.
5 0
3 years ago
How high must you lift a 25 Newton book for it to have the same increase in potential energy as a 20 Newton book that was lifted
Annette [7]

Given :

An object with weight 20 N was lifted to 0.5 meters.

To Find :

How high must you lift a 25 Newton book for it to have the same increase in potential energy as the given book.

Solution :

Since both have same potential energy :

P.E_2 = P.E_1\\\\W_2h_2 = W_1h_1

Putting all given values in above equation :

25h_2 = 20\times 0.5\\\\h_2 = \dfrac{20\times 0.5}{25}\\\\h_2 = 0.4\ m

Therefore, book with same potential energy is at a height of 0.4 m.

4 0
3 years ago
A ball is dropped from the top of a 77 m building. With what speed does the ball hit the ground? _________ m/s
vitfil [10]

Answer:

38.87 m/s

Explanation:

Given that the ball is dropped from a height = 77 m

u = 0 m/s

s = 77 m

a = g = 9.81 m/s²

Applying the expression as:

v^2-u^2=2as

Applying values as:

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 9.81\times 77+0^2}\\\Rightarrow v=38.87\ m/s

<u>The speed with which the ball hit the ground = 38.87 m/s</u>

3 0
3 years ago
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