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Centripetal Force

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Question

A piece of stone tied at the end of a thread is whirled in a horizontal circle. Name the force which provides the centripetal force.

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Solution

The force with which the person pulls the string provides the the centripetal force in this case.

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Q. A piece of stone tied at the end of a thread is whirled in a horizontal circle. Name the force which provides the centripetal force.

Q. A piece of stone of mass

0.2 k g

is tied to the end of a string

1 m

long and whirled in a horizontal circle about the other end of the string. If it performs

90

revolutions per minute, calculate

(a) angular velocity

(b) centripetal acceleration

(c) centripetal force and

(d) the tension in the string

Q. A piece of stone of mass 0.2 kg is tied to the end of a string 1 m long and whirled in a horizontal circle about other end of the string. If it performs 90 revolutions per minute, Calculate
a) angular velocity
b) Centripetal acceleration
c) centripetal force and
d) tension in string.

Q. State whether true or false.
A stone is tied to a string and is whirled in a horizontal circle. If the string breakes when the tension in it becomes greater that

T

, then the maximun centripetal force that can act on the stone is

2 T

.

Q. A stone tied to the end of a string which is

80 c m

long is whirled in a horizontal circle with a constant speed. If the stone makes

14

25 s

, what is the magnitude of centripetal acceleration? (in

m / s^{2}

)

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