Question

The time of one vibration of a simple pendulum may b decreased by??
a) increasing length of pendulum
b) decreasing length of pendulum
c) using a heavier bob
d) using a lighter bob

Answer 1

Answer:

using a heavier bob

Explanation:

this makes the pendulum hard to oscillate as it has more weight than the earlier weight

Answer 2

Answer:

The ‘time of one vibration’ of the simple pendulum can be decreased by decreasing the pendulum length.

Explanation:

• This is because the time period or the time taken to complete one vibration by a simple pendulum which depends upon the ‘length of the pendulum’, ‘the acceleration due to gravity’, and the temperature at that point.
• The time period is defined as which is “directly proportional” to the ‘square root’ of the pendulum length and “inversely proportional” to the acceleration due to the gravity.”  

                        $\mathrm{T}=2 \pi \sqrt{\frac{l}{g}}$

Where, ‘T is the time period’, ‘l’ is the pendulum length and 'g' the acceleration due to gravity.