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
Serhud [2]
3 years ago
11

I have a question regarding friction in rolling without slipping.

Physics
1 answer:
Solnce55 [7]3 years ago
4 0

Explanation:

They probably put "rolls without slipping" in there to indicate that there is no loss in friction; or that the friction is constant throughout the movement of the disk. So it's more of a contingency part of the explanation of the problem.

(Remember how earlier on in Physics lessons, we see "ignore friction" written into problems; it just removes the "What about [ ]?" question for anyone who might ask.)

In this case, you can't ignore friction because the disk wouldn't roll without it.

As far as friction producing a torque... I would say that friction is a result of the torque in this case. And because the point of contact is, presumably, the ground, the friction is tangential to the disk. Meaning the friction is linear and has no angular component.

(You could probably argue that by Newton's 3rd Law there should be some opposing torque, but I think that's outside of the scope of this problem.)

Hopefully this helps clear up the misunderstanding for you.

You might be interested in
Sugar molecules can be oxidized in the cell of animals . This oxidation releases energy for the animal to use. From what soured
qaws [65]

Answer: through digested food

Explanation: cells get their sugar molecules from the food that is taken in by an organism. The food taken in is digested by the stomach into base materials like sugar, fatty acids and amino acids. These base materials are circulated through the blood till they get to the cells where they are needed.

4 0
3 years ago
Read 2 more answers
The critical angle for a special type of glass in air is 30.8 ◦ . the index of refraction for water is 1.33. what is the critica
Alina [70]
When light moves from a medium with higher refractive index to a medium with lower refractive index, the critical angle is the angle above which there is no refracted light, and all the light is reflected. The value of this angle is given by
\theta_c = \arcsin ( \frac{n_2}{n_1} )
where n2 and n1 are the refractive indices of the second and first medium, respectively.

In the first part of the problem, light moves from glass to air (n_a=1.00) and the critical angle is \theta_c = 30.8^{\circ}. This means that we can find the refractive index of glass by re-arranging the previous formula:
n_g=n_1 =  \frac{n_2}{\sin \theta_c}= \frac{1.00}{\sin 30.8^{\circ}}=1.95

Now the glass is put into water, whose refractive index is n_w = 1.33. If light moves from glass to water, the new critical angle will be
\theta_c = \arcsin ( \frac{n_2}{n_1} )=\arcsin( \frac{n_w}{n_g} )=\arcsin( \frac{1.33}{1.95} )=\arcsin(0.68)=43.0^{\circ}
6 0
3 years ago
The resultant velocity with respect to the ground of a fighter
zhuklara [117]

Answer: 145 km/hr

Explanation:

8 0
3 years ago
The useful energy from a computer is carried away from the computer by sound and what else?
Effectus [21]

light

Explanation:

a computer has a screen and speakers, which produce light and siund

4 0
2 years ago
How can you analyze a compound formula
STALIN [3.7K]

Answer:

Chemical formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's chemical formula cannot be reduced any more, then the empirical formula is the same as the chemical formula. Combustion analysis can determine the empirical formula of a compound, but cannot determine the chemical formula (other techniques can though). Once known, the chemical formula can be calculated from the empirical formula.

Explanation:

4 0
3 years ago
Other questions:
  • What effect does observing a substance's physical properties have on the substance
    13·1 answer
  • How is energy transfer related to the ozone layer and its temperature?
    6·1 answer
  • Mystical ride her scooter down the hill from the state of rest when she reaches the bottom of the hill 4.0 seconds later her spe
    9·1 answer
  • Suppose the coefficient of static friction between the road and the tires on a car is 0.638 and the car has no negative lift. Wh
    11·1 answer
  • Help plsss i need #1
    14·1 answer
  • Based on the data given, in what direction will the car accelerate?
    10·1 answer
  • the weatherman reports the storm waves are about 2 meters high and 35 meters apart. What properties of waves is the reporter des
    6·1 answer
  • What is the pressure transmitted in the liquid on a hydraulic pump where an elephant with a weight of 40 000 N is placed on top
    14·1 answer
  • 1. Which object is farthest from the origin at t=2sec
    5·1 answer
  • What is an Alternative fuel?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!