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gavmur [86]
2 years ago
11

Date Page 2. A bicycle of 15kg is moving with the velocity of 10m/s. calculate the kinetic energy. ​

Physics
1 answer:
QveST [7]2 years ago
3 0

Answer:

\boxed {\boxed {\sf 750 \ J}}

Explanation:

Kinetic energy is the energy an object possesses due to motion. It is calculated using the following formula.

E_k= \frac{1}{2} mv^2

In this formula, <em>m</em> is the mass and <em>v </em> is the velocity.

The bicycle has a mass of 15 kilograms and a velocity of 10 meters per second.

  • m= 15 kg
  • v= 10 m/s

Substitute the values into the formula.

E_k= \frac {1}{2} (15 \ kg)(10 \ m/s)^2

Solve the exponent.

  • (10 m/s)²= 10 m/s * 10 m/s = 100 m²/s²

E_k= \frac{1}{2} (15 \ kg)( 100 \ m^2/s^2)

Multiply all the values together.

E_k= \frac{1}{2} ( 1500 \ kg*m^2/s^2)

E_k= 750 \ kg*m^2/s^2

1 kilogram meter squared per second squared is equal to 1 Joule. Therefore, our answer of 750 kg*m²/s² is equal to 750 J.

E_k= { 750 \ J

The kinetic energy of the bicycle is <u>750 Joules.</u>

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Oksanka [162]

Explanation:

We need to calculate the speed of light in each materials

(I). Gallium phosphide,

The index of refraction of Gallium phosphide is 3.50

Using formula of speed of light

v=\dfrac{c}{\mu}....(I)

Where, \mu = index of refraction

c = speed of light

Put the value into the formula

v=\dfrac{3\times10^{8}}{3.50}

v=8.6\times10^{7}\ m/s

(II) Carbon disulfide,

The index of refraction of Gallium phosphide is 1.63

Put the value in the equation (I)

v=\dfrac{3\times10^{8}}{1.63}

v=1.8\times10^{8}\ m/s

(III). Benzene,

The index of refraction of Gallium phosphide is 1.50

Put the value in the equation (I)

v=\dfrac{3\times10^{8}}{1.50}

v=2\times10^{8}\ m/s

Hence, This is the required solution.

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3 years ago
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Triss [41]

Answer:

1) Newton's first law of motion states an object will remain at rest or in uniform will be in uniform motion in a straight line unless a force acts on it

2) Newton's second law states the acceleration of an object is directly proportional to the applied force acting on an object and inversely proportional to the mass of the object

Explanation:

1) With Newton's first law, we are able arrange things within a space and schedule meetings in time knowing that they will remain in place unless an external force changes their positions

2) An example of Newton's second law of motion is that small objects such as a ball are easily accelerated and can be given appreciable acceleration for flight by single, one time contact (such as kicking the ball) while larger objects such as a rock require sustained force application to change their location.

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Which of the following is an example of balanced forces?
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A seesaw remains stationary when two students of equal weight sit on the ends

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What has a larger capacitance, an aluminum sphere with a 10 cm diameter or one with a 100 cm diameter? Question 16 options: 10 c
creativ13 [48]

\boxed{\sf C=\dfrac{Q}{V}}

But

\boxed{\sf \Delta V_{R_2\to R_1}={\displaystyle{\int}^{R_1}_{R_2}}dV=-{\displaystyle{\int}^{R_1}_{R_2}}\dfrac{kQ}{r^2}dR}

  • Hence higher the radius lower the voltage
  • Lower the voltage higher the capacitance .

<h3>100cm diameter having aluminium sphere has a larger capacitance</h3>
3 0
2 years ago
Wagon wheel. While working on your latest novel about settlers crossing the Great Plains in a wagon train, you get into an argum
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Answer:

I = 16.7kgm²

Explanation:

Since, Torque is given by,

\tau = F*r = I*\alpha

here, I = Moment of inertia = ??

\alpha = angular acceleration of wheel = a/r

F = tangential tension acting on the wheel = T

a = acceleration of bag of sand = 2.95 m/s^2

r = radius of wheel = d/2 = 120/2 = 60 cm = 0.60 m

from force balance on sand bag,

mg - T = m*a

T = m*(g-a)

m = mass of sand bag = 20 kg

So, I = T*r/\alpha = m*(g-a)*r/(a/r)

Using known values:

I = 20*(9.81 - 2.95)*0.60/(2.95/0.60) = 16.74

I = 16.7 kgm² = Moment of inertia of wheel experimentally

also, Moment of inertia of wheel theoretically(I') = M*r²

given, M = mass of wheel = 70 kg

I' = 70*0.60²= 25.2 kgm² = Moment of inertia of wheel theoretically

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