If an oscillating mass has a frequency of 1.25 hz, it makes 100 oscillations in

(a) 12.5 s,
(b) 125 s,
(c) 80 s,
(d) 8.0 s

Time, t = 80 seconds

Explanation:

Given that,

The frequency of the oscillating mass, f = 1.25 Hz

Number of oscillations, n = 100

We need to find the time in which it makes 100 oscillations. We know that the frequency of an object is number of oscillations per unit time. It is given by :

t = 80 seconds

So, it will make 100 oscillations in 80 seconds. Hence, this is the required solution.