a boy on a bicycle is resting at the top of a hill then he rides his bicycle down the hill describe how the boy potential and kineti energy differ at the top middle and bottom of the him

Answers

Answer 1

Answer:

Answer:

Explanation:

As the boy is riding from top to bottom of the hill his Potential energy gradually decreasing and simultaneously converting into the Kinetic energy.

At the top, his Potential Energy is maximum and kinetic energy is minimum i.e. zero

In the middle of the hill, he possesses both Potential and kinetic energy with equal magnitude.

At the bottom whole Potential energy is converted into Kinetic energy.

Thus Potential Energy is maximum at the top while Kinetic energy is maximum at the bottom.

Related Questions

Somebody plz answer these 5 only thanks!!!Will mark as brainliest:D
A student who has trouble hearing and must have a written copy of class lectures in order to participate in class is considered to have which of the following?
An object is dropped from a height H above the ground. This free-falling object requires 1.02 s to travel the last 39 m before hitting the ground. From what height H above the ground did the object fall?
Classical physics is a good approximation to modern physics under certain circumstances. What are they?
Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume?

Fossil fuels currently account for the majority of the world’s energy use because they are A. distributed evenly throughout the world. B. nonpolluting. C. renewable energy resources. D. relatively inexpensive and readily available

Answers

Answer: D. relatively inexpensive and readily available

Fossil fuels are non-renewable sources of energy these resources formed by the geological processes occurring in the earth. It takes millions of years for their formation. These includes coal, petroleum, and natural gas. Unfortunately, the distribution of these resources is not even in the regions of the world but efforts have been done by the humans to make them available everywhere. They are relatively inexpensive and readily available this contributes to the majority of the world's energy use.

Fossil fuels currently account for the majority of the world’s energy use because they are relatively inexpensive and readily available.

In short, Your Answer would be Option D

Hope this helps!

A mass of 1.0 kg is initially held in place on a ramp of angle 45o at height of 20. meters above the ground. The mass is released and slides to the bottom of the ramp (h=0). There is friction between the mass and the ramp. At the bottom of the ramp, the object has a speed of 10. m/s. The thermal energy was generated by the friction as the mass slides down the ramp is closest to which value?

Answers

Answer:

The thermal energy generated by the friction as the mass slides down the ramp is $\bf{146~J}$ .

Explanation:

Given:

The mass of the object is, $m = 1.0~kg$

The angle of the ramp is, $\theta = 45^(0)$

The initial height of the object on the ramp is, $h = 20~m$

The final velocity of the object is, $v = 10~m/s$

When the object is at rest on the ramp, its total energy is potential energy. When it moves down the ramp its kinetic energy is increased and potential energy is decreased and a part of its energy is lost to overcome the force of friction. Finally, when it is at the bottom of the ramp, its total energy becomes only kinetic energy.

The total energy of the object at a height $20~m$ on the ramp is given by

$E_(1) &=& mgh\n~~~~&=& (1.0~kg)(9.8~m/s^(2))(20~m)\n~~~~&=& 196~J$

When the object is at the bottom of the ramp, its total energy is given by

$E_(2) &=& (1)/(2)mv^(2)\n~~~~&=& (1)/(2)(1.0~kg)(10~m/s)^(2)\n~~~~&=& 50~J$

So, the energy that is lost as thermal energy is given by

$E &=& E_(1) - E_(2)\n~~~~&=& 196~J - 50~J\n~~~~&=& 146~J$

A piston above a liquid in a closed container has an area of 1m2. The piston carries a load of 350 kg. What will be the external pressure on the upper surface of the liquid?

Answers

Pressure is defined as the force exerted per unit of area. From the information given, the force exerted can be attributed to the mass of the load carried by the piston. This means that its weight is equivalent to the force it exerts.

Weight = mass(9.81) = 3433.5 Newtons
Area of piston = 1 m^2
Pressure = Force/Area = 3433.5/1 = 3433.5 N/m^2 or Pascals.

Answer:

3.43 kPa

Explanation:

In the human circulatory system, arteries carry blood away from the heart to different parts of the body. Veins carry blood from different parts of the body back to the heart. A scientist claims that the greater the amount of exercise a person performs, the greater the amount of oxygen (O2) the body uses. He records the oxygen concentration in the blood of people while they are riding an exercise bike. The graphs show the results of this investigation.a. Identify at least two systems within the human body that work together during exercise.

b. Explain how the evidence from the data in the graphs supports or does not support the scientist’s claim.

Answers

Respiratory and circulatory systems are the two systems within the human body that work together during exercise.

How does the respiratory and circulatory systems work together during exercise?

The respiratory system:

allows the exchange of gases intake of oxygen and exhalation of carbon-dioxide.
oxygenation of blood at the lungs.

The circulatory system:

transports deoxygenated blood to the lungs for oxygenation.
delivers oxygenated blood to the appropriate tissue.
Hence, during exercise more oxygen is used by the body.

The claim by scientist is true?

During exercise:

breathing rate increases from about 15 times per minute to roughly 40–60 times per minute.
heart rate also rises, providing more oxygen to reach your muscles and allowing them to continue moving.

To learn more about respiratory system, circulatory system, blood, exercise, and oxygen here,

brainly.com/question/13128077

#SPJ2

Answer:

There are many different systems involved in when we exercise, the three main ones are the Respiratory system which is involved in breathing the circulatory system which is about circulation of blood around the body and finally the muscular system and finally the Muscular system which is about how we move.

Explanation:

If the data consistently do not support the hypothesis, then CLEARLY, the hypothesis is NOT a reasonable explanation of what you are investigating. The hypothesis is rejected, and we search for a new interpretation, an new hypothesis that supports the experimental data

How many seconds would an Olympic skier take to race down a 2500 meter course going 250 m/sec?