Question

1. A sewing machine needle moves with a frequency of 2.5Hz. Approximately how long does it take it to move from the highest point to the lowest point in its travel?

A)0.10s
B)1.25s
C)0.40s
D)0.20s
E)0.80s

Answer 1

Answer:

Time taken, t = 0.4 seconds

Explanation:

It is given that,

A sewing machine needle moves with a frequency of 2.5 Hz, f = 2.5 Hz

We need to find the time taken by it to move from the highest point to the lowest point in its travel. The time period is given by :

$T=\dfrac{1}{f}$

$T=\dfrac{1}{2.5}$  

T = 0.4 seconds

So, the time taken to travel from the highest point to the lowest point in its travel. Hence, this is the required solution.