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
Brums [2.3K]
3 years ago
10

An object of mass 20 kg is dropped

Social Studies
1 answer:
8090 [49]3 years ago
8 0

Answer: PE = 800j, KE = 800J

Explanation:

To calculate the potential energy, we use the formula  

Potential Energy = Mgh

M = 20kg, g = 10m/sˆ2 , h = 4m

=20 × 10 × 4

=800J

At the maximum height  S = 4 and the initial velocity u = 0 The acceleration g = 10m/sˆ2

Using the third equation of motion

vˆ2 = uˆ2 + 2as

= 0ˆ2 + 2 × 10 ×  4

vˆ2 = 80

Kinetic Energy (KE) is given by  

KE = ½ mvˆ2

= ½ × 20 × 80

=800J  

You might be interested in
In an experiment is:
Pavlova-9 [17]

its a because you change the variables independent to dependent

4 0
3 years ago
The modern United States uses substantial amounts of mined minerals every year. The largest category of mined products we use is
Fiesta28 [93]

The answer Is feldspar

it is a  rock-forming mineral  which has particular importance in the glass and ceramics industries since it works as a fluxing agent. This means that feldspar reduces the melting temperature of quartz, consequently helping to control the viscosity of glass. Moreover, this rock-forming mineral is  one of the most common minerals in existence, forming approximately 60% of earth’s terrestrial rocks. Finally, each year about 600,000 tons of feldspar is mined in the United States from quarries in South Dakota, Oklahoma, Virginia, California, North Carolina, and Idaho. Besides this, vast deposits of felspar exist throughout the world, but the greatest challenge remains extracting and transporting the minerals to the point of consumption.

5 0
3 years ago
Why were Americans upset with Great Britain before the War of 1812? A. Great Britain closed its own ports but kept French ports
topjm [15]

The correct answer is: C) Great Britain's navy captured American sailors before the war began.

Because of the conflict between Great Britain and Napoleon Bonaparte's France, both countries tried to block the United States from trading with the other, which damaged and angered Americans deeply. Later on, to make things much worse, the Royal Navy of Great Britain took American sailors into the marine forces without notice to fight on its behalf. Both of these causes ultimately led to President James Madison's Declaration of War upon the British.

8 0
4 years ago
Dear Ms. Martinez:
Lina20 [59]
It’s either a or d I’m not sure
7 0
3 years ago
Read 2 more answers
Question 6
DerKrebs [107]

The study may be biased. It implies the untruthful with results that are not correlated with the thesis.

8 0
3 years ago
Other questions:
  • Observers tend to attribute actors’ behavior to ____ factors, and actors tend to attribute their own behavior to ____ factors. d
    9·1 answer
  • When interviewed for a news story about racial tensions, leo denies that he or any of his friends are racist. when he is with hi
    10·1 answer
  • "What percentage of the U.S. workforce is involved in producing, processing, or selling our nation’s food and fiber?"
    14·1 answer
  • What happens to warm the body up when it is cold.
    10·1 answer
  • ________ is a technique for combating pre-performance anxiety in which you allow your anxiety to present itself for up to a few
    14·1 answer
  • What is the minimum level of income possible before poverty becomes life threatening ?
    13·2 answers
  • Last week, Becky read that labels can bias perceptions, so she does not support placing diagnostic labels on psychological probl
    7·1 answer
  • Which type of analysis would be most useful to someone buying a product at a store and why
    8·1 answer
  • As a future teacher what is your own assessment philosophy and explain your reason of choosing such philosophy.​
    11·1 answer
  • ________________is the movement of people from one specified area to another. Migration Demography Fecundity Mortality.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!