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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.

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Describe what happens when your circuit is completed. Tap on one of the wires with your mouse. Describe what happens. Explain yo
klemol [59]

Answer: when a circuit is completed (it allows the flow of electrons which causes the light bulb to produce light).

Explanation:

A circuit is described as an electrical setup that is consists of a light bulb, a switch, a wire, a battery which is arranged to allow the flow of electric current. The major components of the electrical circuit includes:

--> The BATTERY which is the source of voltage to the circuit,

--> the WIRE which is the conductive path,

--> the LIGHT BULB which is the load that needs electrical power to operate and

--> the SWITCH which is the controller.

When a circuit is COMPLETED when electrons can flow from one end of a battery all the way around, through the wires, to the other end of the battery. Along its way, it will carry electrons to electrical objects that are connected to it like the light bulb and make it to produce light.

There are different types of electric circuit which are designed to create a conductive path of current or electricity. They include:

--> closed circuit

--> open circuit

--> short circuit

--> parallel circuit

--> series circuit.

6 0
3 years ago
Pulling up on a rope, you lift a 4.25 kg bucket of water from a well with an acceleration of 1.80 m/s2 . What is the tension in
sattari [20]

Answer:

49.3 N

Explanation:

Given that Pulling up on a rope, you lift a 4.25 kg bucket of water from a well with an acceleration of 1.80 m/s2 . What is the tension in the rope?

The weight of the bucket of water = mg.

Weight = 4.25 × 9.8

Weight = 41.65 N

The tension and the weight will be opposite in direction.

Total force = ma

T - mg = ma

Make tension T the subject of formula

T = ma + mg

T = m ( a + g )

Substitutes all the parameters into the formula

T = 4.25 ( 1.8 + 9.8 )

T = 4.25 ( 11.6 )

T = 49.3 N

Therefore, the tension in the rope is 49.3 N approximately.

8 0
3 years ago
A cylinder is 0.10 m in radius and 0.20 in length. Its rotational inertia, about the cylinder axis on which it is mounted, is 0.
Bumek [7]

Answer:5 rad/s^2

Explanation:

Given

Radius of cylinder r=0.1 m

Length L=0.2 in.

Moment of inertia I=0.020 kg-m^2

Force F=1 N

We Know Torque is given by

Torque =I\alpha =F\cdot r

where \alpha =angular\ acceleration

I\alpha =F\cdot r

0.02\cdot \alpha =1\cdot 0.1

\alpha =5 rad/s^2    

5 0
4 years ago
Which statement best describes how waves carry energy?
Ugo [173]

Answer:

Energy moves from one place to another through the wave. answer A

7 0
3 years ago
Read 2 more answers
Suppose your friend investigated the color of pea pods and concluded that green pods (G) were dominant over yellow pods (g).
Katarina [22]

Answer:

Terms in this set (25) Mendel crossed true-breeding plants having yellow peas with plants having green peas. The resulting plant had all yellow peas. An F1 cross resulted in 3/4ths of the plants having yellow peas and 1/4th of the plants having green peas.

Explanation:

5 0
3 years ago
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