1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stolb23 [73]
3 years ago
9

Two balls of equal size are dropped from the same height from the roof of a building. One ball has twice the mass of the other.

When the balls reach the ground, how do the kinetic energies of the two balls compare
Physics
1 answer:
frutty [35]3 years ago
3 0

Answer:

The kinetic energy of the more massive ball is greater by a factor of 2.

Explanation:

By conservation of energy, we know that the initial energy = final energy. At first, the balls are dropped from a height with no initial velocity so their initial energy is all potential energy. When they reach the bottom, all their energy is kinetic energy. So all of their energy is changed from potential to kinetic energy. This means that the ball with greater potential energy will have a greater kinetic energy.

Potential energy = mgh. Since g = gravity is a constant and h = height is the same, the only difference is mass. Since mass is directly proportional to potential energy, the greater the mass, the greater the potential energy, so the more massive ball has a greater initial potential energy and will have a greater kinetic energy at the bottom.

Additionally, let B1 = lighter ball with mass m and let B2 = heavier ball with mass m2. Since we know that intial potential energy = final kinetic energy. We can rewrite it as potential energy = kinetic energy = mass * gravity constant * height. For B1, it is mgh and for B2 it is 2mgh, so B2's kinetic energy is twice that of B1.

You might be interested in
A ball with a weight of 0.5 N is submerged under water and then released. There is a net force of 5 N upwards. what is the buoya
Natasha2012 [34]

Answer:

4.5 N upward

Explanation:

You take the net force and subtract it from the weight

~DjMia~

6 0
3 years ago
A wagon is accelerating down a hill. Which statement is true?
Ira Lisetskai [31]
Potential energy decreases and kinetic energy increases.

Potential energy is related to the height, since the wagon is going downhill, height decreases and potential energy decreases.

Kinetic energy is related to the speed, since the wagon is speeding up, kinetic energy increases.
3 0
3 years ago
Which segment represent slowing down
lakkis [162]

Answer:

A downward sloping line

Explanation:

6 0
3 years ago
Read 2 more answers
Which of the following are functions of both cells and living organisms?
Nana76 [90]
I believe it is, All of the above.
6 0
3 years ago
Which term describes the image of an object that is placed in front o a convex mirror?
Dmitriy789 [7]

Answer:

The answer of this question is :- Virtual image

5 0
2 years ago
Read 2 more answers
Other questions:
  • The brightest star in the night sky in the northern hemisphere is Sirius. Its distance from Earth is estimated to be 8.7 light y
    11·1 answer
  • In this section of a circuit, a current of 2.6 A flows across R1. What is the potential difference V between point x and point y
    5·1 answer
  • Fran works due north of home. Her husband Ben works due east. They leave for work at the same time. By the time Fran is 7 miles
    5·1 answer
  • Which are true of alpha radiation?
    5·1 answer
  • 90% of people marry their 7th-grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine
    12·2 answers
  • A tray containing 0.20kg of water at 20degree celsius is placed in a freezer. The temperature of the water drops to 0degree cels
    14·2 answers
  • Which burrito will heat up faster .03oz or .05 oz
    14·1 answer
  • 10-kg box is sliding across an ice rink at 10 m/s . A skater exerts a constant force of 10 N against it. How long will it take f
    12·1 answer
  • How is the density of water different from the densities of most other substances?
    8·1 answer
  • Gamma rays can cause cancer, but they can also be used to treat cancer. How
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!