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
aliina [53]
3 years ago
8

A ball having a weight of 1.5 N is dropped from a height of 4 meters. (Neglect air friction.) How much mechanical energy is "los

t" just before it hits the ground?
Physics
2 answers:
mafiozo [28]3 years ago
6 0
If there is no air resistance, then NO energy is 'lost'.

At the height of 4 meters above the ground, the ball has

                    (weight) x (height) 
                =    (1.5 N) x (4 m) 

                =         6 joules

of gravitational potential energy, relative to the ground.

If it's dropped, then the potential energy it has gets converted
to kinetic energy all the way down. 

Just before it hits the ground, it has no more potential energy,
but it has 6 joules of kinetic energy.

No energy is lost.  It just changes from potential to kinetic.
Both of them are forms of mechanical energy.
NikAS [45]3 years ago
4 0
As this mechanical energy is associated with height, it would be "Potential Energy" in particular.

U = mgh
U = F.h
U = 1.5 * 4
U = 6 Joules

So, 6 J of energy is lost before it hits the ground.

Hope this helps!
You might be interested in
How can electric shock be prevented?
Nina [5.8K]

Wearing rubber or stay away from water or/ and a conductor

7 0
3 years ago
Explain how the extension of a spring is determined
fgiga [73]

Answer:

For a given spring the extension is directly proportional to the force applied For example if the force is doubled, the extension doubles When an elastic object is stretched beyond its limit of proportionality the object does not return to its original length when the force is removed

Explanation:

6 0
3 years ago
Why do metals make good electrical conductors?
alexdok [17]

Answer:

Explained

Explanation:

Metals are good conductors of electricity because they contain free electrons in their atoms. The outer shell of atom's of metal have free electrons. These free electrons are responsible of electrical conductivity of metals. These electron are not bounded by the attraction forces of the nucleous. They are free to wonder in lattice of positive ion and thus allow electrical conductivity.

3 0
3 years ago
Argument changes meaning because of an ambiguous word or phrase.
Virty [35]
I think the answer is D
7 0
3 years ago
Which statement describes a benefit of a model that uses three balls to model the Sun-Earth-Moon system? A. Every aspect of the
Dovator [93]

Answer:

D. It represents a very large, complex system.​

Explanation:

I just did it on a p e x...

8 0
2 years ago
Other questions:
  • A round loop of wire carries a current of 100 A, has a radius of 10 cm, and its normal (vector) makes an angle of 30∘ with a mag
    12·1 answer
  • A box weighs 2000N and is accelerated uniformly over a horizontal surface at a rate of 8 m/s^2. The opposing force of friction b
    14·1 answer
  • How do i calculate acceleration? pls help! thanks :)
    15·1 answer
  • 2 (a) What is the distance from the Sun to Earth in terms of solar radii? Earth radii?
    12·1 answer
  • Sobre un cuerpo de 700 g de masa que se apoya en una mesa horizontal se aplica una fuerza de 5N en la dirección del plano. Calcu
    6·1 answer
  • Which type of galaxy has the most active star formation?
    5·2 answers
  • Help now WILL MARK BRAINLEST
    11·1 answer
  • Help please
    14·1 answer
  • This is written question
    6·1 answer
  • What would Hubble's constant be if we found one galaxy moving away at 30,000 km/s at a distance of 600 Mpc?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!