In an experiment on simple pendulum to determine the acceleration due

1.	In an experiment on simple pendulum to determine the acceleration due to gravity, a student measures the length of the thread as 63.2 cm and diameter of the pendulum bob as 2.256 cm. The student should take the length of the pendulum to be(a) 64.328 cm(b) 64.3 cm(c) 65.456 cm(d) 65.5 cm
Answer» Answer is : (b) 64.3 cm Length of pendulum = Length of thread + Radius of bob = 63.2+2.256/2 = 63.2+1.128 = 64.328 cm But now the student must apply rule for taking significant digits in a measurement. In addition or subtraction, Number of digits after decimal in result = Least number of digits after decimal in quantities added So, length of pendulum = 64.3 cm.

In an experiment on simple pendulum to determine the acceleration due to gravity, a student measures the length of the thread as 63.2 cm and diameter of the pendulum bob as 2.256 cm. The student should take the length of the pendulum to be(a) 64.328 cm(b) 64.3 cm(c) 65.456 cm(d) 65.5 cm

Answer»

Answer is : (b) 64.3 cm

Length of pendulum = Length of thread + Radius of bob

= 63.2+2.256/2 = 63.2+1.128

= 64.328 cm

But now the student must apply rule for taking significant digits in a measurement.

In addition or subtraction,

Number of digits after decimal in result = Least number of digits after decimal in quantities added

So, length of pendulum = 64.3 cm.

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In an experiment on simple pendulum to determine the acceleration due to gravity, a student measures the length of the thread as 63.2 cm and diameter of the pendulum bob as 2.256 cm. The student should take the length of the pendulum to be(a) 64.328 cm(b) 64.3 cm(c) 65.456 cm(d) 65.5 cm

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