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andriy [413]
3 years ago
13

How a body is charged ?​

Physics
1 answer:
katen-ka-za [31]3 years ago
7 0

Answer:

Explanation:

Following are the three important ways by which a body can get charged. ⇒ By conduction :When an uncharged body is made in contact with a charged body, the charge flow into the non charged body and the body gets charged. ⇒ By rubbing: When a body is rubbed with another body, both of them gets charged.

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A 50n brick is suspended by a light string from a 30kg pulley which may be considered a solid disk with radius 2.0m. the brick i
igomit [66]

Brick is held at a position which is at height 2 m from the floor

Now it is released from rest and hit the floor after t = 4 s

Now the acceleration of the brick is given by

y = v_i* t + 0.5 at^2

2 = 0 + 0.5 * a * 4^2

a = 0.25 m/s^2

a)

Now in order to find the tension in the string

we can use Newton's law

F_{net} = ma

mg - T = ma

50 - T = \frac{50}{9.8}*0.25

T = 48.72 N

part b)

Now for the pulley

moment of inertia= \frac{1}{2}mr^2

m = 30 kg

R = 2 m

I = \frac{1}{2}*30*2^2

I = 60 kg m^2

Now the angular speed just before brick collide with the floor

w = \frac{v}{r}[\tex]here we have[tex]v = v_i + a* t

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v = 1 m/s

Now we will have

L = angular momentum = I w = I*\frac{v}{R}

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8 0
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