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
goldenfox [79]
4 years ago
12

How long will it take a 400 W engine to lift a 100 N object up to a height of 80 m?

Physics
2 answers:
Norma-Jean [14]4 years ago
4 0
<h3>Answer:</h3>

20 seconds

<h3>Explanation:</h3>

<u>We are given</u>;

  • Power of the engine as 400 watts
  • Force as 100 N
  • Distance the object is lifted up as 80 m

We are required to determine the time taken.

  • We need to know that power is the rate of work done

Therefore;

  • Power = Work done ÷ time

But, work done  = Force × distance

  • Therefore; In this case;

Work done = 100 N × 80 m

                  = 8000 Joules

  • Since , Power = Work done ÷ time

Then, time = Work done ÷ Power

Thus;

Time = 8000 J ÷ 400 W

       = 20 s

Therefore, the time taken by the engine to lift the object is 20 seconds

Kitty [74]4 years ago
3 0

Answer:

The time will be 20 seconds

Explanation:

The work is:

W=F*d

where:

F=force[N]

d=distance[m]

W=100*80=8000[J]

The time will be given by:

t= Work/power

where:

work=work done by the force[J]

Power=work done in an interval of time [Watts]

t=8000/400

Analysis of units (J / J/s) = [s]

t=20[s]

You might be interested in
A barge of mass 5.00 ×104 kg is pulled along the Erie Canal by two mules, walking along towpaths parallel to the canal on either
boyakko [2]

Answer:  219,344.5 j

Explanation:

from the question we have the following parameters

mass of barge (m) = 5 x 10^4 kg

angle of ropes (θ) = 45 degrees

force by each mule (F1) = 1.10 kN = 1100 N

force by each mule (F2) = 1.10 kN = 1100 N

distance (s) = 141 m

work done by the mules = force x cos θ x distance

since we are calculating the force of both mules we have to both mules before we can use in the equation

force = 1100 + 1100 = 2200 N

work done =  2200 x cos (45) x 141

work done = 219,344.5 j

5 0
3 years ago
What is the purpose of family?
Marrrta [24]

Answer:

Purpose of family:

Basically main role of a family towards the society is its continuity by both reproduction and  interaction with each other. The main contribution of family to the society is society's continuation.

Types of families:

The family further divided into six types nowadays. Namely,

  1. Nuclear Family
  2. Single Parent
  3. Extended Family
  4. Childless Family
  5. Step family
  6. Grandparent Family

<u>Defining each Family and their pros and cons :</u>

1). Nuclear Family: The most basic kind of family is nuclear family based on two parents and their biological or adopted children. Number of children is variable, some have one and others have more than one. The main aim of the nuclear family is to up bring their kids and teach them how to socialize in the society.

<u>Pros of nuclear family</u>:

  • Both parents work and more likely financially stable
  • Children gets more balanced parenting
  • Concerned about education
  • Focus more on health issues both mental and physical
  • More socialize in the society

<u>Cons of nuclear family</u>:

  • Higher level of stress factor due to increased number of dependents
  • Have higher rates of disputes
  • Children become egotistical due to over possessive parents

2). Single Parent: Consists of either a mother or a father living with one or more than one child. Parents may initially married, separated or departed, or passed away (one of them). Like other family structures single parents also have some pros and cons.

<u>Pros of single parent</u>:

  • Close relationship with each other due to less family members
  • More responsible as duties are not being further divided.
  • Both children and parents are strong and independent

<u>Cons of single parent</u>:

  • Less income due to sole parent
  • May relay on financial help
  • Quality living may compromise due to sole earning
  • Children become mentally unstable by living alternatively with parents (in divorced cases).

3). Extended Family: Basically extended families are joint families, in which grandparents, parents and children live together to support each other both financially and socially.

<u>Pros of extended family</u>:

  • More tolerance level among children
  • Care and  Respects for people older in age is practiced
  • Have emotional support
  • Have social support

<u>Cons of extended family</u>:

  • Face more financial crises due to large number of members in a family
  • Intervening in personal matters with each other
  • Low privacy

4).Childless Family: Partners who have no any children either by choice or due to infertility.

<u>Pros of childless family</u>:

  • More financially strong
  • No one to take care of
  • More free to do basic thing like travelling, shopping and fun activities
  • Have more chance to fulfill desired goal

<u>Cons of childless family</u>:

  • Develop fear of isolation by the time
  • Society pressure (not having kids)
  • Develop sense of lacking something important (infertile couples)

5). Step family:

When two families start living to gather, like two divorced people get married and living together with their children (from 1st partner).

<u>Pros of step family</u>:

  • Child gets advantage by living with both parents
  • Financially stable due to two source of incomes

<u>Cons of step family</u>:

  • Feeling of living forcefully with second parent
  • Couple fight often due to each other's children conflict
  • children develop leas tolerance

6) Grandparent Family: In which grandchildren are raised by their grandparents.

<u>Pros of grandparent family</u>:

  • Children have strong relationship with their elderly
  • More protective environment for children

<u>Cons of grandparent family:</u>

  • Less financially table
  • Difficult to raise children due to old age and related health issue
  • Big age gap  

<u>Similarities and Differences:</u>

By considering the pros and cons of different family structure we come to the point that many of them have some similarities like financial stability, strong bonding, and more socialization. Likewise there are few differences as well as some families share strong bond while other suffers from isolation. Some are more financially stable and others are less. Some have children while other are childless. Some children have both parents while other have single or step patent. Some of them have high tolerance while other has less. Some live quality life whiles other compromise on their needs and wants.

7 0
3 years ago
a baseball is thrown with 100 J of energy.if the ball is moving at 20.0 m/s, what is the mass of the ball in KG
Pepsi [2]
(1/2)(0.148834996 kilograms)(44.70400 meters per second)^2
theres your answer
which equals 147.8
4 0
4 years ago
Friction is a force in which two objects __________. A. Collide and move in one direction B. Are repelled from each other C. Sli
Schach [20]

Answer: (C) Slide against each other

Explanation:

Think about rubbing our palms together, and they get warm that right there is friction.

6 0
3 years ago
Our Sun undergoes slight orbital motion mostly due to the gravitational force exerted by Jupiter. If our solar system only conta
Sonja [21]

Answer:

it would be longer

3 0
3 years ago
Other questions:
  • A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s i
    12·1 answer
  • But is the answer A, B, C, or D
    15·1 answer
  • What usually results when an organism fails to maintain homeostasis?
    12·2 answers
  • Find the net work done by friction on the body of a snake slithering in a complete circle of 1.04 m radius. The coefficient of f
    5·1 answer
  • You are traveling down the highway when you notice a cop 200 meters ahead of you. For the next 5 seconds, you step on the bake t
    9·1 answer
  • Describe the mirror formula for a concave mirror in a shortcut way​
    5·1 answer
  • Please help! I’ll give brainliest! :)
    7·1 answer
  • Can someone help with this question pls
    14·1 answer
  • A 0.07 kg tennis ball, initially at rest, leaves a racket with a speed of 56 m/s. If the ball is in contact with
    10·2 answers
  • What is Archimedes principal ?​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!