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
posledela
3 years ago
10

3 examples when friction is helpful?

Physics
1 answer:
Svetllana [295]3 years ago
4 0
Some examples of when friction is helpful are: to help the movement of tires. When you walk, and also, when you erase. :)
You might be interested in
A boy pushes a 50 kilogram wagon with a force of 4 N east while an orangutan pushes the wagon
ladessa [460]
The wagon does not move
6 0
3 years ago
I dropped an apple (mass 0.1kg) from the window because i'm weird. (15m above the ground). How fast was it going when it hit the
Olegator [25]

Answer:

I think the answer is 1 m per second.

5 0
3 years ago
An electron passes through a point 2.83 cm 2.83 cm from a long straight wire as it moves at 35.5 % 35.5% of the speed of light p
igor_vitrenko [27]

Answer:

The magnitude of electron acceleration is 2.34 \times 10^{15} \frac{m}{s^{2} }

Explanation:

Given:

Distance from the wire to the field point r = 2.83 \times 10^{-2} m

Speed of electron v = 35.5 \%c

Current I = 17.7 A

For finding the acceleration,

First find the magnetic field due to wire,

  B = \frac{\mu _{o}I }{2\pi r }

Where \mu_{o} = 4\pi   \times 10^{-7}

  B = \frac{4\pi \times 10^{-7}  \times 17.7 }{2\pi (2.83 \times 10^{-2} ) }

  B = 12.50 \times 10^{-5} T

The magnetic force exerted on the electron passing through straight wire,

  F = qvB  

  F = 1.6 \times 10^{-19} \times 0.355 \times 3 \times 10^{8} \times 12.50 \times 10^{-5}

  F = 21.3 \times 10^{-16} N

From the newton's second law

  F = ma

Where m = mass of electron = 9.1 \times 10^{-31} kg

So acceleration is given by,

   a = \frac{F}{m}

   a = \frac{21.3 \times 10^{-16} }{9.1 \times 10^{-31} }

   a = 2.34 \times 10^{15} \frac{m}{s^{2} }

Therefore, the magnitude of electron acceleration is 2.34 \times 10^{15} \frac{m}{s^{2} }

7 0
2 years ago
Which of the following statements is/are true? Check all that apply. Check all that apply. The total mechanical energy of a syst
Taya2010 [7]

Answer:

1) True, 2) True, 3) False, 4) False, 5) False

Explanation:

1) True. Dissipative energy cannot be recovered, in general it is a form of heat

2) True. The dissipation can be by radiation, heat

3) False. Mechanical energy is divided into K and U but not in equal parts

4) False. When there are dissipative interactions, part of the mechanical energy is set in the form of heat, so its value decreases

5) False. Mechanical energy is the sum of those two energies

8 0
2 years ago
which component of a motor causes the magnetic field produced by the coil to regularly reverse and therefore always be repelled
gavmur [86]
Spark altnator spark altnator spark altnator spark altnator 
8 0
3 years ago
Other questions:
  • There are many different mediums that waves travel through. What type of wave causes distortion of a medium?
    14·1 answer
  • If an electric circuit has 0 A of current running through it then .
    9·1 answer
  • The speed of an electromagnetic wave is a constant, 3.0 × 108 m/s. The wavelength of a wave is 0.3 meters. What is the frequency
    15·2 answers
  • A block of lead has dimensions of 4.50cm by 5.20cm by 6.00cm. The block weighs 1587g. From this information, calculate the densi
    5·1 answer
  • A car starts from 0 m along a road and accelerates at 0.5 m/s^2 to the right. A second car starts from 1000 m along the road and
    9·1 answer
  • Albert views Henry moving by at a constant velocity. Henry has a light clock and also a stopwatch which were synchronized when a
    11·1 answer
  • Please help!!!! on both of them this is physics not math
    14·1 answer
  • The reason a person finds it easier to float in salt water compared with fresh water is that in salt water...
    13·1 answer
  • What is the difference between muscular strength and muscular endurance
    8·2 answers
  • What causes all landforms to take shape and develop? (SCIENCE)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!