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Laws of Motion

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Physics Part I

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Physics

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Two identical piano wires kept under the same tension T have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which will lead to occurrence of 6 beats/s when both the wires oscillate together would be

  • 0.02

  • 0.03

  • 0.04

  • 0.01


A.

0.02

According to law of tension, the frequency of the string varies directly as the square root of its tension


straight n space proportional to space square root of straight T

fraction numerator increment straight n over denominator straight n end fraction space equals space 1 half. fraction numerator increment straight T over denominator straight T end fraction
or
fraction numerator increment straight T over denominator straight T end fraction space equals space 2 space straight x space fraction numerator increment straight n over denominator straight n end fraction
fraction numerator increment straight T over denominator straight T end fraction space equals space 2 space straight x space 6 over 600

equals space 0.02

According to law of tension, the frequency of the string varies directly as the square root of its tension


straight n space proportional to space square root of straight T

fraction numerator increment straight n over denominator straight n end fraction space equals space 1 half. fraction numerator increment straight T over denominator straight T end fraction
or
fraction numerator increment straight T over denominator straight T end fraction space equals space 2 space straight x space fraction numerator increment straight n over denominator straight n end fraction
fraction numerator increment straight T over denominator straight T end fraction space equals space 2 space straight x space 6 over 600

equals space 0.02

2519 Views

Define inertia.

The property by virtue of which the body cannot change its state of rest or uniform motion in a straight line, unless an external force is acting on the body is called as Inertia. 
1316 Views

What is Aristotle’s law of motion?

Aristotle’s law of motion states that an external force is required to keep the body in motion.
2445 Views

State Galileo’s law of motion.

Galileo’s law of motion states that, a body continues to move in the same direction with constant speed, if no force is acting on the body. 
1332 Views

When the branches of an apple tree are shaken, the apples fall down. Why?

The apple fall from an apple tree when it shaken because of inertia of rest. Apple is in a state of rest and when the tree is suddenly shaken, apples still tends to remain in it's same state of rest whereas branches move. 

So, the apples fall down. 
1475 Views

Is Aristotle’s law of motion now correct?

No. Aristotl'e law of motion is false. 
1233 Views