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
Body of a 218 kg starta from rest and attains the velocity of 63 m/s in 9 second
Vanyuwa [196]

Answer:

567m

Explanation:

By using formula of velocity.

7 0
3 years ago
Which of these is a benefit of social networking ?
Alisiya [41]

Answer:

Staying connected to friends

Explanation:

hope this helps

6 0
2 years ago
Wood is an example of a translucent material.<br> True<br> False
Svetradugi [14.3K]
False, wood is a solid structure that is not see through
3 0
2 years ago
What is the advantages and disadvantages of 'howe' truss?
Vinvika [58]

Answer:

Advantages: Very sturdy, can have several cracks in structure before breaking

disadvantages: best for short distances, not attractive, hard to maintain

6 0
3 years ago
You drop a rock from rest from the top of a tall building.1)how far has the rock fallen in 2.60 s?
Bess [88]
Answer:
distance = 33.124 meters

Explanation:
To solve this question, we will use one of the equations of motion which is:
s = ut + 0.5a * t^2
where:
s is the distance that we want to get
u is the initial velocity = 0
a is the acceleration due to gravity = 9.8 m/sec^2
t is the time = 2.6 sec

Substitute with the givens in the equation to get the distance as follows:
s = ut + 0.5a * t^2
s = (0)(2.6) + 0.5(9.8)(2.6)^2
s = 33.124 meters

Hope this helps :)
7 0
3 years ago
Other questions:
  • An old mining tunnel disappears into a hillside. You would like to know how long the tunnel is, but it's too dangerous to go ins
    10·1 answer
  • Which of the following places would u expect to have the coldest climate?
    5·2 answers
  • A 90dB sound wave strikes an eardrum whose area is 5.0×10^-5m^2. How much energy is absorbed by the eardrum per second
    6·1 answer
  • Which special effects technique is being used in television weather reports in which meteorologists stand in front of moving map
    6·2 answers
  • A car has a mass of 2,000kg and is traveling at 28 meters per second what is the car's kinetic energy
    14·1 answer
  • Suppose 4 J of work are needed to stretch a spring 14 cm from its natural position. How much work is needed to stretch it 20 cm
    10·1 answer
  • An offshore oil platform houses a drill for drilling oil. The drill descends from the platform and enters the ocean. At the bott
    5·2 answers
  • The electricity received at an electrical substation has a potential difference of 20,000 V. What should the ratio of the turns
    12·1 answer
  • What is Resistance? How is it measured? ​
    15·2 answers
  • Which sentence correctly uses a comma to separate coordinate adjectives?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!