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
Kazeer [188]
3 years ago
8

To move a refrigerator of mass 170 kg into a house, a mover puts it on a dolly and covers the steps leading into the house with

a wooden plank acting as a ramp. The plank is 9.6 m long and rises 3.3 m. The mover pulls the dolly with constant velocity and with a steady force 1400 N up the ramp. How much work does he perform? The acceleration of gravity is 9.8 m/s 2 . Answer in units of J.
Physics
1 answer:
Arte-miy333 [17]3 years ago
7 0

Explanation:

The given data is as follows.

         mass (m) = 170 kg,        Distance (s) = 9.6 m

        Height (h) = 3.3 m,         Force (F) = 1400 N

First, we will calculate the work performed by her as follows.

                W = Fs

                    = 1400 N \times 9.6 m

                    = 13440 J

Hence, minimal work necessary to lift the refrigerator is as follows.

               U = mgh

                   = 170 kg \times 9.8 \times 3.3 m

                   = 5497.8 J

Therefore, we can conclude that he performed 5497.8 J of work.

You might be interested in
Which of the following has the greatest inertia? A. a toy car . . B. a jet airliner . . C. a full-size car . . D. a pick-up truc
Setler79 [48]
Inertia is defined as the property of matter by which causes it to resist changes in its state of motion such as changes in velocity. From the given options above, the option that has the greatest inertia would be option B. A jet airliner. 
7 0
3 years ago
How did mount st. Helen get its name
steposvetlana [31]

The modern name, Mount St. Helen's, was given to the volcanic peak in 1792 by seafarer and explorer Captain George Vancouver of the British Royal Navy. He named it in honor of fellow countryman Alleyne Fitzherbert, who held the title 'Baron St. Helen's.

5 0
3 years ago
List the 3 types of collisions that occur when your vehicle hits an object.
koban [17]

These collisions are: "a Vehicle Collision, a Human Collision, Internal Collision." A vehicle collision is a collision that involves two or more vehicles and is when the vehicles collide against each other creating a unbalanced force since how the force comes from opposite directions. A human collision would involve a vehicle and a human which would also be a unbalanced force but the human wouldn't have much affect of it's speed. A internal collision is when something happens inside the vehicle which decreases, or increases the vehicles speed.

Hope this helps!

7 0
3 years ago
If an object is placed between a convex lens and its focal point, which type of image will be produced?
Andreas93 [3]
<span>virtual, upright, and magnified</span>
8 0
3 years ago
Read 2 more answers
What is meaning of convection​
crimeas [40]

Answer:

Convection is heat transfer through the movement of liquids and gases.

3 0
3 years ago
Other questions:
  • What is the force on an object that goes from 35 m/s to 85 m/s in 20 seconds and has a mass of 148 kg
    7·1 answer
  • A tungsten wire has resistance R at 20°C. A second tungsten wire at 20°C has twice the length and half the cross-sectional area
    8·1 answer
  • The process by which a characteristic spreads across space from one place to another over time is diffusion. True / False.
    11·1 answer
  • The law of conservation of mass is important in ecology because _________.
    5·1 answer
  • Describe an electrical circuit
    5·1 answer
  • A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm and a fulcrum (or pivot point
    8·1 answer
  • A standard inverting op-amp circuit has an R1 of 10 kΩ and an Rf of 220 kΩ. If the offset current is 100 nA the output offset vo
    14·1 answer
  • What makes these image a represent of what research <br>​
    12·1 answer
  • Dr. Potter provides vaccinations against polio and measles.
    11·2 answers
  • E-mail is usually a poor choice for the distribution of sensitive electronic files because __________. A. Paper copies seem more
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!