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 is fitness walking beneficial?
jonny [76]

Answer:

It can relieve stress and improve mood.

6 0
2 years ago
Read 2 more answers
Plz help I will give brainly to the correct answer
Tresset [83]

Answer:

D. x-rays

Explanation:

Lower frequency: Radio waves, microwaves and infrared have lower frequency than visible light. Shorter wavelength: Ultraviolet, x-rays and gamma rays have a shorter wavelength than visible light.

4 0
2 years ago
The train traveled 500 kilometers north to Odessa in 2 hours . What’s the train’s speed ? What is the velocity ?
ElenaW [278]

Explanation:

Speed is distance over time.

500 km / 2 hr = 250 km/hr

Velocity is speed and direction.

250 km/hr north

7 0
3 years ago
Drawing a ray diagram for an object far from convex lens requires how many rays?
Crank

Answer

4

Explanation:

four rays can also explain the ray diagram if the object is at infinity

5 0
2 years ago
Can a machine like a lever, produce a greater force than what you put into it? Can it increase the energy that you put into it?
morpeh [17]

Answer:

yes

Explanation:

the force is multiplied by the levers length of the handle

7 0
2 years ago
Read 2 more answers
Other questions:
  • Color is determined by: how high or how low the wave actually is the amplitude of the wave subjective transduction the length of
    14·2 answers
  • Which is an example of a physical change? wood rots. gasoline ignites. water evaporates. a nail rusts. description?
    9·2 answers
  • A positively-charged piece of plastic exerts an attractive force on an electrically neutral piece of paper. This is because: 1.
    13·1 answer
  • A ball is thrown vertically upward (assumed to be the positive direction) with a speed of 24.0 m/s from a height of 3.0 m. (a) H
    14·1 answer
  • Identify the magnetic north pole of Earth’s magnet?
    6·2 answers
  • At what efficiency is a photovoltaic array running if insolation on the collector is 650 W/m2, the total collector area is 10 m2
    15·1 answer
  • a body of mass 3kg is dropped from a height 15m.what would be the velocity of the body at 10m of height? take g=10m/s​
    12·1 answer
  • A regulation basketball has a 15 cm diameter and may be appropriated as a thin spherical shell.
    6·1 answer
  • Two shuffleboard disks of equal mass, one orange and the other yellow, are involved in an elastic, glancing collision. The yello
    9·1 answer
  • A bike accelerates uniformly from rest to a speed of 10 m/s over a distance of 50 m. (a) Determine the acceleration of the bike.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!