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Veronika [31]
3 years ago
13

in an experiment a rubber stopper is attached to one end of a string that is passed through a plastic tuber before weights are a

ttached to the other end. the stopper is whirled in an horizontal circular path at a constant speed. What would happen to the radius of the circle if the student whirls the stopper at a greater speed without changing the weights.
Physics
1 answer:
Zinaida [17]3 years ago
4 0

As we know that weight is attached at the other end of the string and that weight remains constant.

So here we can say that tension in the string will always remain same

T = mg

now for the stopper on the other side is revolving in horizontal circle with some speed. for this circular motion the Tension force will provide centripetal force to it.

So here for the stopper we can say

T = \frac{Mv^2}{R}

now since tension always remains same as the suspended mass is fixed so if we increase the speed of the stopper the radius must have to increase so that tension will be same in the string

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Answer:

emf induced in the loop, at the instant when 9.0s have passed = 1.576 * 10 ⁻² V.

Direction is counter clockwise.

Explanation:

See attached pictures.

6 0
4 years ago
You place an object 36.0 cm in front of a concave
vivado [14]

<em><u>Given</u></em><em> </em> :

  • <em>O</em><em>bject </em><em>position</em><em> </em>( u ) = - 36 cm
  • <em>focal</em><em> </em><em>length</em><em> </em>( f ) = - 16 cm
  • <em>image position</em><em> </em>( v ) = ?

now, we know

=》

\frac{1}{f}  =  \frac{1}{v}  +  \frac{1}{u}

=》

\frac{1}{ - 16}  =  \frac{1}{ - 36}  +  \frac{1}{v}

=》

\frac{1}{v}  =  \frac{ - 1}{16}  -  \frac{ - 1}{36}

=》

\frac{1}{v}  =  \frac{ - 9 - ( - 4)}{144}

=》

\frac{1}{v}  =  \frac{ - 9 + 4}{144}

=》

\frac{1}{v}  =  \frac{ -5}{144}

=》

v =  \frac{144}{ - 5}

=》

<em><u>v =  - 28.8</u></em>

So<em><u>, image position</u></em> = 28.8 cm, at same side of object .

8 0
3 years ago
calculate the kinetic energy of a car with a mass of 500kg traveling at a velocity of 10m/s^2 north. A) 2,500j B) 25,000j C) 50,
Arte-miy333 [17]
The correct answer would be A) 2,500j
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3 years ago
The express train can travel 100 miles per hour. This information describes the trains
Andreas93 [3]
Rate of speed, probs is the answer
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3 years ago
What is the potential difference between the plates of a 3.7-f capacitor that stores sufficient energy to operate a 75.0-w light
Elena L [17]

The potential difference between the plates will be 1552 Volts.

<h3>What is a potential difference?</h3>

Voltage, or the difference in electric potential between two points, is defined as the amount of labor per unit of charge needed to move a test charge between the two points.

Given that a 3.7-f capacitor that stores sufficient energy to operate a 75.0-w

The potential difference will be calculated by the formula below:-

Q = I t            

Where I = charge / time

Q = V * C    

V C = I t

V = I t / C

V = 75 C/s x 60 sec / 2.9 faraday

V =  1552 Volts

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4 0
1 year ago
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