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Marina86 [1]
3 years ago
12

A flywheel of mass 182 kg has an effective radius of 0.62 m (assume the mass is concentrated along a circumference located at th

e effective radius of the flywheel).
(a) How much work is done to bring this wheel from rest to a speed of 120 rev/min in a time. interval of 30.0 s?
(b) What is the applied torque on the fly-wheel (assumed constant)?
Physics
1 answer:
musickatia [10]3 years ago
4 0

Answer:

A)5524J,

B) 29.2Nm

Explanation:

This question can be treated using work- energy theorem

Work= change in Kinectic energy

W= Δ KE

Work= difference between the final Kinectic energy and intial Kinectic energy.

We know that

Kinectic energy= 1/2 mv^2 .............eqn(1)

This can be written in term of angular velocity, as

KE= 1/2 I

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Two flat conductors are placed with their inner faces separated by 17 mm. If the surface charge density on one of the inner face
blagie [28]

Answer:

Explanation:

electric field between plates

=  surface charge density / ε₀

= 108 x 10⁻¹² / 8.85 x 10⁻¹² (ε₀ = 8.85 x 10⁻¹² )

= 12.20 V/ m

Electric potential diff

= electric field x distance between plates

=  12.20 x 17 x 10⁻³ V

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4 0
4 years ago
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Minchanka [31]
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7 0
3 years ago
Kamal, Kamala, Krishna invert a sum of RS= 30,000 on a business in the ratio 2 : 3 : 5. Find the each of their investment.​
Crazy boy [7]

Here's the <em><u>solution</u></em>,

Let the <em><u>shares</u></em> be 2x, 3x and 5x according to their shared <em><u>investment</u></em> ratio,

now, we know :

=》2x + 3x + 5x = 30000

=》10x = 30000

=》x = 3000

So, value of x = 3000

hence, the <em><u>share</u></em> of each <em><u>shareholder</u></em> is :

  • kamal = 2x = 6000
  • kamala = 3x = 9000
  • Krishna = 5x = 15000

i hope it helped.....

3 0
3 years ago
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When you are sitting in a car that is turning around a circle, you feel your body is being thrown outward. However, your physics
Degger [83]

Answer:

Explanation:

Centripetal force acts towards the center of the circle. However, our body is not attached to the car, it is only kept in the car. Therefore, when an external force acts on the car, inertia acts on the body due to the sense that it will try to remain in the same state.

Although the car takes the turn, but due to the inertia, the body will try to move forward; but since the seat belts are on, it is enforced to move with the car in a circular motion

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3 years ago
Which one is it? WIll mark brainlist
maksim [4K]

Answer:

C

Explanation:

Graph C represents a linear function. As the height increases by 1 meter, the gravitational energy increases by 10 joules respectively.

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3 years ago
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