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
Speech on injustice in the world today (maybe one reference from the bible)?
gregori [183]

Explanation:

Injustice means something unfair. It is done to harm a person who is innocent injustice is increasing in our society every day. Our success has no value if we are doing injustice with someone. This might be in the form of discrimination, unfair practices, etc that hurt others.

Injustice gives rise to anger in a society that leads to crime. Due to this injustice, many people are deprived of good facilities like poor people have to work hard throughout the day to earn their livelihood but rich people do not have to do that.

Bible also gives a message of kindness and love towards others. We all must do justice as per The Bible.

8 0
3 years ago
In which of the following types of ownership does each co-owner have the right to sell his or her interest without the consent o
LenKa [72]

Answer: c. Tenancy in common

Explanation: When two or more parties concurrently or simultaneously posses distinct and undivided ownership of a property such that each distinct party has the right to bargain or transact his or her own interest in the property without needing to inform or seek consent of the other parties. Tenancy in common does not subject the owners to having equal share of the property, any of the parties may wish to transfer or attach a creditor to his or her interest. Also, in tenancy in common, upon the death of any party or interest holder, the heir of the tenant becomes the owner of the tenant's interest.

4 0
3 years ago
How do developing countries today differ from
arlik [135]
C - Most developing countries are involved in trade with countries around the world; around the world at best traditional civilizations interacted with bordering societies or civilizations
4 0
3 years ago
If a psychologist is interested in studying the risk factors that lead to delinquency in adolescence, on what goal of psychology
laila [671]

Answer:

Predicting behavior

Explanation:

Predicting behavior in psychology helps to have insight to human behavior that has not undergone test,it gives insight of the underlying reasons behind of human actions. Sometimes psychologist make use of "predictive model" in acheiving these.

It should be noted that the goal of psychology that researcher focused when psychologist are interested in studying the risk factors that lead to delinquency in adolescence, is Predicting behavior

8 0
3 years ago
What phenomena explain. the occurrence of a rainbow after the rain
Scorpion4ik [409]

Answer:

b.

Explanation:

phenomena of reflection of light.

8 0
3 years ago
Other questions:
  • How did early humans express themselves?<br> ?
    10·2 answers
  • How has cultural diffusion changed eating habits in the united states?
    10·1 answer
  • Individuals who overreact to everything and are overly dramatic and vain are most likely to be diagnosed with ________ personali
    10·1 answer
  • An OSHA compliance officer visited a warehouse of ABC Worldwide to conduct an inspection. The inspector found several safety vio
    5·1 answer
  • If that pic is SEDENTARY OR NOMADIC?
    10·1 answer
  • Clarice wakes up in a daze and remembers that she has to do laundry. On her way to the laundry room, she encounters an enormous
    15·1 answer
  • This is the practice of threatening an enemy with massive military retaliation for any aggression.
    12·2 answers
  • How do you feel if your juniors disobey you?​
    15·2 answers
  • ASAPPPPPPPP PLEASE!!!!!!!!!!!
    15·2 answers
  • A pwc is equipped with a lanyard-type engine cut-off switch. What must the pwc operator do?.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!