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
LenaWriter [7]
3 years ago
15

What are the positives and negatives of friction?

Physics
1 answer:
guapka [62]3 years ago
4 0

Answer:

<em>Positives (advantages) of Friction:</em>

Friction is responsible for many types of motion -

  • It helps us walk on the ground
  • Brakes in a car make use of friction to stop the car
  • Asteroids are burnt in the atmosphere before reaching Earth due to friction.
  • It helps in the generation of heat when we rub our hands.

<em>Negatives (disadvantages) of Friction:</em>

  • Friction produces unnecessary heat leading to the wastage of energy.
  • The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects.
  • Forest fires are caused due to the friction between tree branches.
  • A lot of money goes into preventing friction and the usual wear and tear caused by it by using techniques like greasing and oiling.

You might be interested in
t is the estimated distance traveled through the air by a marshmallow that is launched from a 15- cm long launcher when it is pl
DerKrebs [107]

Answer:

10

Explanation:

15 cm minus 5 cm

5 0
3 years ago
A box contains about 5.54 1021 hydrogen
Aleks [24]

Answer:E=33.71\ J

Explanation:

Given

No of atoms of hydrogen N=5.54\times 10^{21}

Temperature of room T=21^{\circ}\approx 294\ K

Thermal energy of the atoms is given by

E=\frac{3}{2}NkT

where k=boltzmann constant

E=\frac{3}{2}\times 5.54\times 10^{21}\times 1.38\times 10^{-23}\times 294

E=33.71\ J

Hence the energy of the atoms is 33.71\ J

5 0
3 years ago
If the flea jumps straight up, how high will it go? (Ignore air resistance for this problem; in reality, air resistance plays a
Savatey [412]

Answer:

The flea will reach to a height of 5.2 cm.

Explanation:

Let us assume it is given that, a flea reaches a takeoff speed of 1.0 m/s over a distance of 0.50 mm.

Initial speed, u = 1 m/s

Initial distance, x = 0.5 mm

We need to find the height reached by the flea. Using third equation of motion to find it.

At maximum height, its final speed, v = 0

v^2-u^2=2ah

Here, a = -g

-u^2=-2g(h-x)\\\\1^2=2\times 9.8\times (h-0.5\times 10^{-3})\\\\h=0.052\ m

or

h = 5.2 cm

So, the flea will reach to a height of 5.2 cm.

6 0
3 years ago
What is the significance of the direction of an electric field line at some point on the line?
Lemur [1.5K]

Answer with Explanation:

The direction of the electric field line at any point gives us the direction of the electric force that will act on a positive charge if placed at the point. We know that if we place a charge in an electric field it will experience a force, as we know that force is a vector quantity hence it requires both magnitude and direction for it's complete description. The direction of this electric force that acts on a charge is given by the direction of the electric field in the space. In case the charge is negatively charged electric force will act on it in the direction opposite to the direction of electric field at the point.

7 0
4 years ago
If systems interacts with objects outside itself . why would the momentum of the system change ?
Masteriza [31]
Vibration 
speed
heart rate
4 0
4 years ago
Other questions:
  • What is shown in the Diagram?
    13·2 answers
  • Organisms inherit specific traits and characteristics from their parents. Albinism is an inherited disorder that occurs when an
    8·2 answers
  • 1. Compare and contrast heat and temperature.
    5·1 answer
  • A rifle fires a 3.56 x 10-2-kg pellet straight upward, because the pellet rests on a compressed spring that is released when the
    13·1 answer
  • In the braking test of a sports car, its velocity is reduced from 70 mi/h to zero in a distance of 180 ft with slipping impendin
    15·1 answer
  • The ozone layer _____.
    11·1 answer
  • What causes variations in temperature on Earth?
    15·2 answers
  • What are some examples of electromagnetic energy and what are the different types of electromagnetic energy?
    6·1 answer
  • What is the answer for y = 4cos(5x)?
    11·1 answer
  • Rooms are fitted with ventilators to let the air move around. The phenomenon involved is:
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!