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
Contact [7]
3 years ago
14

Which of the following scenarios describes an object being acted on by a conservative force?

Physics
1 answer:
andrew11 [14]3 years ago
7 0

Answer:

Option: A feather falls from one end of a tube to the other inside a vacuum.

Explanation:

To answer the question we need to first understand what is meant by Conservative Force.

In principle, Conservative forces are basically forces that are not affected by outside parameters (<em>such as friction, air resistance etc</em>). If the present force is strictly based on the initial and the final location of the object, with the inbetween path being irrelevant, the force will be conservative. A conservative force will be zero if we are looking at a closed path-system. We can also say that the system's energy loss will not be a function of the distance covered but is a function of displacement.

Looking at the available options, we can see that:

<u>Option A: A woman hikes up a mountain to a point 20 feet above ground.</u>

This is a Non Conservative force as this case does not depend just on displacement but also in  the path in between, i.e. hiking up the mountain there will be other forces that will affect the woman such as air resistance.

<u>Option B: A dishwasher was pulled up to a window by a rope, using a pulley system.</u>

This is a Non Conservative force as this case does not depend just on displacement but also in the inbetween path along with the forces present in a pulley system such as friction.

<u />

<u>Option C: A feather falls from one end of a tube to the other inside a vacuum.</u>

This is a Conservative force as here we are looking at a vacuum and its a closed system of no other forces present due to vacuum. However, we CAN'T say that ALL forces in a Vacuum Are Conservative because there are cases of dynamic steady state fields where the system is prone to other forces (i.e. open system).

<u />

<u>Option D: A puck glides across and slowly comes to a stop on an ice rink.</u>

This is a Non Conservative force as this case does not depend just on displacement but also the motion until it comes to a stop, which is possibly due to the friction between the ice rink and the puck.

<u />

You might be interested in
An object is in motion when it undergoes a continuous change of what?
Goryan [66]
Answer:
continuous change in position with respect to time

Explanation:
Velocity is defined as the rate of change of the position of an object with respect to its time.
It's the vector quantity of speed as it has both magnitude and direction.

Hope this helps :)
5 0
3 years ago
A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predete
arlik [135]

Answer:

0.0389 cm

Explanation:

The current density in a conductive wire is given by

J=\frac{I}{A}

where

I is the current

A is the cross-sectional area of the wire

In this problem, we know that:

- The fuse melts when the current density reaches a value of

J=520 A/cm^2

- The maximum limit of the current in the wire must be

I = 0.62 A

Therefore, we can find the cross-sectional area that the wire should have:

A=\frac{I}{J}=\frac{0.62}{520}=1.19\cdot 10^{-3} cm^2

We know that the cross-sectional area can be written as

A=\pi \frac{d^2}{4}

where d is the diameter of the wire.

Re-arranging the equation, we  find the diameter of the wire:

d=\sqrt{\frac{4A}{\pi}}=\sqrt{\frac{4(1.19\cdot 10^{-3})}{\pi}}=0.0389 cm

3 0
3 years ago
Josh starts at a position of x=0 meters at the left side of the front of the classroom. Over the course of the class he walks ba
Aneli [31]
Answer:
180 meters

Explanation:
Josh walks 6 meters to the right and the 6 meters back. This means that in one time, Josh walks a total distance of 6+6 = 12 meters
Now, we are given that Josh walks this same distance 15 times.
Therefore, we will multiply this distance by 15 to get the total distance that he walks as follows:
Total distance = 12*15 = 180 meters

Based on the above calculations, Josh walks 180 meters over the course of the class

Hope this helps :)
3 0
3 years ago
A tree frog leaping upward off the tree branch is pulled downward by
jeka94

Answer:

Yeah  I think you're right

Explanation:

Because every obj is in motion till acted upon by a force(the branch)

4 0
3 years ago
A vertical cylinder with a heavy piston contains air at 300 K. The initial pressure is 2.0 x 105 Pa and the initial volume is 0.
aleksklad [387]

Find answers and explanations in the attachments

8 0
3 years ago
Other questions:
  • What is the surface temperature of a distant star having a peak wavelength of 475 nm?
    13·1 answer
  • What is an item in which magnetic domains can be aligned and a magnetic field induced for a short period of time
    14·2 answers
  • Sandra's target heart rate zone is 135bpm—172bpm. Marissa's target heart rate zone is 143bpm—176bpm. They stop playing basketbal
    15·2 answers
  • When the car carrying the unbelted driver crashes, what brings the driver to a stop
    9·1 answer
  • What did Dr. Kidwell's fighting so the birds eating a box on different tree trunks
    5·1 answer
  • Hawaii is located over a tectonic plate. Because of this, Hawaii is MOST LIKELY to experience A) erosion. B) tornadoes. C) hurri
    14·2 answers
  • Microstyle writing is..
    13·2 answers
  • What is the entropy of a closed system in which 28 distinguishable grains of sand are distributed among 1000 distinguishable equ
    10·1 answer
  • What is the definition of the half-life of a radioactive isotope?
    13·1 answer
  • A 1.5 kg baseball is pitched at 38 m/s and is hit by the batter. It heads directly back at the pitcher at 27 m/s.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!