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Motion in a Plane Multiple Questions and Answers.
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Physics Mcqs
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Laws of Motion
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Motion in a Plane
Exercise Questions ::
Laws of Motion
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Laws Governing Gravity
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Acceleration due to Gravity
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Scalar and Vector
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Motion in a Plane
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Forces
21.
A stone tied to the end of string 80cm long is whirled in horizontal circle with a constant speed. If the stone makes 14 revolutions in 25 sec, what is the magnitude of acceleration of the stone?
A.
680 cm/s
2
B.
860 cm/s
2
C.
720 cm/s
2
D.
990 cm/s
2
View Answer
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Answer:
Option
D
Explanation:
a = rω
2
= r(2πn/t)
2
a = (80×4×(22/7)
2
×14
2
)/14
2
= 990cm/s
2
.
See More Information
Tutorial Link:
Published by:Michael Daani
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» Laws Governing Gravity
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» Scalar and Vector
» Motion in a Plane
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