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
yanalaym [24]
3 years ago
5

You pick up a 3.4 kg can of paint from the ground and lift it to a height of 1.8 m. how much work do you do on the can of paint?

you hold the can stationary for half a minute, waiting for a friend on a ladder to take it. how much work do you do during this time? you friend decides against the paint, so you lower it back to the ground. how much work do you do on the can as you lower it?
Physics
1 answer:
zepelin [54]3 years ago
5 0

1) +60.0 J

The work done when lifting an object is equal to the change in gravitational potential energy of the object:

W=\Delta U= m g \Delta h

where m is the mass of the object, g is the gravitational acceleration, \Delta h is the variation of height of the object.

In this problem, m = 3.4 kg, g = 9.8 m/s^2 and \Delta h = +1.8 m, so the work done is:

W=(3.4 kg)(9.8 m/s^2)(1.8 m)=+60.0 J

And the work done is positive, since the object has gained potential energy.


2) 0 J

In this case, there is no variation of the heigth of the object:

\Delta h =0

Therefore, the variation of potential energy is zero:

\Delta U = 0

And so, the work done is zero as well:

W=0


3) -60.0 J

In this case, the variation of height of the object is negative, since the object has been lowered to the ground:

\Delta h = -1.8 m

So, the object has lost potential energy:

W=(3.4 kg)(9.8 m/s^2)(-1.8 m)=-60.0 J

And so the work done is negative:

W=-60.0 J

You might be interested in
WHO WANts TO HAVE SOME GLIZZY ACTION
Lilit [14]
Bruh huh.............
6 0
2 years ago
A uniform electric field exists in the region between two oppositely charged plane parallel plates. a proton is released from re
dedylja [7]

According to Newton's second law

E.e = a * mp  ..... (1)

where

E is the magnitude of the electric field; e = 1.6 * 10^-19 is the elementary charge; mp = 1.67*10^-27 kg is the proton mass; a is the acceleration.

So, the distance

l = at^2/2 .......(2)

The proton accelerated

a = 2l / t^2 ...........(3)

From equations (1) and (3)

E= 32.51 V/m

Electric field

The physical field that surrounds electrically charged particles and exerts a force on all other charged particles in the field, either attracting or repelling them, is known as an electric field (also known as an E-field).  It can also refer to a system of charged particles' physical field. Electric charges and time-varying electric currents are the building blocks of electric fields. The electromagnetic field, one of the four fundamental interactions (also known as forces) of nature, manifests itself in both electric and magnetic fields.

To learn more about an electric field refer here:

brainly.com/question/15800304

#SPJ4

5 0
2 years ago
The acceleration due to gravity at the surface of a planet depends on the planet's mass and size; therefore other planets will h
Cloud [144]
Chaff has also written about his book of Mormon that is not true to say this but it doesn't have the
5 0
3 years ago
The moment of a force is calculated from the product of the ———— and the———— distance from the line of action of the force to th
bixtya [17]

Answer: It is the product of the (force)multiplied by the (perpendicular) distance from the line of action of the force to the pivot

Explanation:

7 0
3 years ago
Your first day on the job, you get a call from the owner complaining that her network connection is down. A quick check of the c
mylen [45]

Answer:

TDR means Timeout Detection and Recovery.

Explanation:

TDR is a feature of the Windows operating system which detects response problems from a graphics card, and recovers to a functional desktop by resetting the card. If the operating system does not receive a response from a graphics card within a certain amount of time (default is 2 seconds), the operating system resets the graphics card.

8 0
3 years ago
Other questions:
  • A dog sitting at the edge of the pool notices that 5 waves pass in fromt of his paws over a span of 1.72 seconds. He watches one
    10·2 answers
  • A constant force of 40N acting on a body initially at rest gives it an acceleration of 0.1m/s inverse 2 for 4s .calculate the wo
    13·1 answer
  • Which type of bone is this <br>covalent bond<br>hydrogen bond <br>ionic bond​
    8·1 answer
  • Write the following number in scientific notation: 658000
    6·1 answer
  • Which of these oceanic landforms is similar to a canyon?
    11·2 answers
  • What is the average temperature of the city, 89.6 Fahrenheit, on the Celsius scale?
    7·1 answer
  • Is pushing a car across a smooth road positive, negative or zero work?
    10·1 answer
  • Why does the cannon move backward when the cannon ball is shot?
    6·1 answer
  • True or false: Displacement is the total path traveled by an object
    13·1 answer
  • What does Newton's first law of motion state? (3 points) a Every action has an equal and opposite reaction. b A body at rest wil
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!