PHYSICS HIGH SCHOOL

A ball rolls from point A to point B. The total energy of the ball at point A isn’t the same as the sum of its potential energy and kinetic energy at point B. Which statement best explains this situation?The rolling ball doesn’t follow the law of conservation of energy.

Some of the ball’s energy is transformed to thermal energy.

The rolling ball loses some of its energy because of gravity.

The ball absorbs some of its own potential energy.

Answers

Answer 1
Answer: The rolling ball loses some of its energy because of gravity. Gravity and friction are two factors that slows the acceleration of the ball causing the ball to slow down at point B. If the situation is a free fall, then gravity is a factor, but if it is in a horizontal displacement,then there is friction that counterflows against the applied force.
Answer 2
Answer:

Some of the ball’s energy is transformed to thermal energy.

Conservation of mechanical energy

The principle of conservation of energy states that sum of potential energy and kinetic energy is constant.

M.A = P.E + K.E

where;

  • P.E is the potential energy
  • K.E is the kinetic energy

The mechanical energy is always conserved, although it may be converted from one form to another.

The rolling ball follows the law of conservation of energy, the lost energy may be transformed to thermal energy.

Learn more about conservation of energy: brainly.com/question/166559

Related Questions

The wavelengths for visible light rays correspond to which of these optionsA. About the size of a pen B. About the size of a virus or large molecule C. About the size of an amoeba D. Smaller than an atom E. About the size of a football field
Is a battery that generates hydrogen,is that very explosive
If the velocity of an object changes from 65 m/s to 98 m/s during a time interval of 12 s, what is the acceleration of the object?
The slope of a line on a distance-time graph is
How can i find the acceleration?(rope and grinder have no weight) *** sorry for my english

The mass of a stroller and the child it carries is 23.7 kg. A man pushes the stroller with a force of 142 N at an angle of 38.0° to the vertical. The stroller experiences a friction force of 24.0 N due to the brake accidentally being on. What is the stroller's acceleration forward?A. 5.99 m/s2
B. 3.90 m/s2
C. 2.68 m/s2
D. 4.98 m/s2

Answers

the horizontal resultant force applied is 142*Cos(38) which is 135.62N

24N of opposing force
therefore the total force acting on the stroller is 135.62-24=111.62N

applying the formula f=ma
where f is force
m= mass
a= acceleration
plugging the values we get the stroller's acceleration forward as 3.90 m/s^2

If Sarah melts 10g of tin. What mass of melted tin would she have at the end of the experiment?​

Answers

Answer:

10g

Explanation:

The experiment is about melting of tin. When solid tin is melted, it retains the amount of substance it originally has and we expect it to still be 10g.

Mass is the quantity or amount of matter contained in a substance. For most chemical processes, the law of conservation of matter is always succinctly observed.

The law states that "matter is neither created nor destroyed in a chemical reaction or process". Although melting is a phase change, we can adapt this law to the process. Owning to no loss of matter in the melting procedure, the amount of substance remains the same.

Therefore, we are left with about the same mass of substance we started with which is 10g.

Answer:

10g

Explanation:

As the Law of Conservation of Mass states that " Mass can neither be created nor be destroyed in a chemical reaction".

Though melting of tin isn't a chemical change, the same logic is applied here...

Hence,

The mass of tin will be 10 g itself...

A business letter style that shows all text aligned to the left side of the page is calleda. full block.
b. left block.
c. justified block.
d. modified block.

Answers

Left block I believe

Which statement best describes the formation of diamonds? A. Diamonds form in kimberlites under very low pressure.
B. Diamonds form in kimberlites under very high pressure.
C. Diamonds form in talc under very high pressure.
D. Diamonds form in talc under very low pressure.

Answers

The correct answer would be (b.) Diamonds form in kimberlites under very high pressure. Kimberlites are one of the most important sources of the mined diamonds and these are formed with a very high pressure. The statement in (d.) would best describe the formation of diamonds.

A 60 kg person walks up a 75 m tall hill. How much gravitational potential energy do they have at the top of the hill?

Answers

Answer:

45,000 J

Explanation:

The gravitational potential energy of a body can be found by using the formula

GPE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 10 m/s²

From the question we have

GPE = 60 × 10 × 75

We have the final answer as

45,000 J

Hope this helps you

When describing a maritime polar air mass, you might say it formed over _____ and is _____.

Answers

The correct answer for the question that is being presented above is this one: "an air mass that formed over land. it is cold and dry." When describing a maritime polar air mass, you might say it formed over land and is cold and dry. It's temperature can range from around freezing to near 20 degrees Celsius

Answer:

water, cold and moist

Explanation:

I just did a test on it and got it wrong using land, cold and dry and got it right using this anwer

Other Questions
In a closed system, a cart with a mass of 1.5 kg is rolling to the right at 1.4 m/s, while another cart of mass 1.0 kg is rolling to the left at the same speed. What is the total momentum of the system of two carts?a. 0.0 kgm/s b. 0.50 kgm/s c. 0.70 kgm/s d. 3.5 kgm/s
In comparing the Ptolemaic system to the Copernican system, neither is entirely correct since Ptolemy said the earth was at the center and Copernicus said the planets had circular orbits.
A typical land snail's speed is 12.2 meters per hour. How many miles will the snail travel in one day(24hrs)?
Imagine that current is flowing couterclockwise around a squre loop of wire in front of you