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algol13
2 years ago
11

What do you mean by Potential energy.? ➢ No Palgarized content! Thanks :D​

Physics
2 answers:
kolbaska11 [484]2 years ago
8 0

Answer:

Potential energy refers to the stored up energy within an object, that builds up and can potentially be used to propel that object.

Explanation:

A famous example, would be water behind a dam. The rushing water fills up behind the dam, and since it's being held in one place, it will build up until of course the dam is either moved or lifted, and then all the water will be forced (due to all the energy that was being stored) down the rest of the stream.

I hope the explanation makes sense. If it doesn't, please let me know and I'll try to find another one for you :)

forsale [732]2 years ago
7 0
Potential energy is the an objects energy that is currently not being used but can be used. Example: A ball at the top of a hill is full of potential energy, and as soon as it begins rolling that becomes kinetic energy because it is in use. (Hard to explain but I hope this helps.)
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A yoyo with a mass of m = 150 g is released from rest as shown in the figure.
avanturin [10]

(1) The linear acceleration of the yoyo is 3.21 m/s².

(2) The angular acceleration of the yoyo is 80.25 rad/s²

(3) The  weight of the yoyo is 1.47 N

(4) The tension in the rope is 1.47 N.

(5) The angular speed of the yoyo is 71.385 rad/s.

<h3> Linear acceleration of the yoyo</h3>

The linear acceleration of the yoyo is calculated by applying the principle of conservation of angular momentum.

∑τ = Iα

rT - Rf = Iα

where;

  • I is moment of inertia
  • α is angular acceleration
  • T is tension in the rope
  • r is inner radius
  • R is outer radius
  • f is frictional force

rT - Rf = Iα  ----- (1)

T - f = Ma  -------- (2)

a = Rα

where;

  • a is the linear acceleration of the yoyo

Torque equation for frictional force;

f = (\frac{r}{R} T) - (\frac{I}{R^2} )a

solve (1) and (2)

a = \frac{TR(R - r)}{I + MR^2}

since the yoyo is pulled in vertical direction, T = mg a = \frac{mgR(R - r)}{I + MR^2} \\\\a = \frac{(0.15\times 9.8 \times 0.04)(0.04 - 0.0214)}{1.01 \times 10^{-4} \ + \ (0.15 \times 0.04^2)} \\\\a = 3.21 \ m/s^2

<h3>Angular acceleration of the yoyo</h3>

α = a/R

α = 3.21/0.04

α = 80.25 rad/s²

<h3>Weight of the yoyo</h3>

W = mg

W = 0.15 x 9.8 = 1.47 N

<h3>Tension in the rope </h3>

T = mg = 1.47 N

<h3>Angular speed of the yoyo </h3>

v² = u² + 2as

v² = 0 + 2(3.21)(1.27)

v² = 8.1534

v = √8.1534

v = 2.855 m/s

ω = v/R

ω = 2.855/0.04

ω = 71.385 rad/s

Learn more about angular speed here: brainly.com/question/6860269

#SPJ1

3 0
1 year ago
Lynn rubs a balloon with a piece of wool, which causes the balloon to pick up some of the electric charges from the wool. Lynn t
Hitman42 [59]

Answer:

electrostatics

gravitational forces

Explanation:

rubbing the ballon leads to it acquiring charges that are opposite to that in the wall.the electostatic forces attract the ballon to the wall and tyhe gravitational pull later acts on the ballon causing it to fall down

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3 years ago
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A car at the top of a ramp starts from rest and rolls to the bottom of the ramp, achieving a certain final speed. If you instead
zimovet [89]

Answer:

It must be 4 times high.

Explanation:

  • Assuming that the car can be treated as a point mass, and that the ramp is frictionless, the total mechanical energy must be conserved.
  • This means, that at any time, the following must be true:
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⇒      m*g*h = \frac{1}{2} * m*v^{2}

  • Let's call v₁, to the final speed of the car, and h₁ to the height of the ramp.

       So, at the bottom of the ramp, all the gravitational potential energy

      must be equal to the kinetic energy of the car (Defining the bottom of

      the ramp as our zero reference for the gravitational potential energy):

       m*g*h_{1}  = \frac{1}{2} * m*v_{1} ^{2}  (1)

  • Now, let's do v₂ = 2* v₁
  • Replacing in (1) we get:

        m*g*h_{2}  = \frac{1}{2} * m*(2*v_{1}) ^{2} (2)

  • Dividing (2) by (1), and rearranging terms, we get:
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2 years ago
The two main currents that affect the united states on the eat coast and west coast
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<span>The California current on the west coast which runs from north to south and the Gulf Stream on the East coast which runs from south to north.</span>
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Why can biofuels be described as renewable resources?​
gulaghasi [49]

Answer:

Biofuel is fuel that is produced through contemporary processes from biomass, rather than by the very slow geological processes involved in the formation of fossil fuels, such as oil. Since biomass technically can be used as a fuel directly, some people use the terms biomass and biofuel interchangeably. 

Biofuel, any fuel that is derived from biomass—that is, plant or algae material or animal waste. Since such feedstock material can be replenished readily, biofuel is considered to be a source of renewable energy, unlike fossil fuels such as petroleum, coal, and natural gas.

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