Answer:
1.19 revolutions per second.
Step-by-step explanation:
Given:
A rotating object makes 5/6 of a revolution in 7/10 second.
To find:
Find the approximate speed in revolutions per second ?
Solution:
As here given that a rotating object makes 5/6 of a revolution in 7/10 second,
we will have to find that in one second how many revolution does this object make:
By unitary method:
In [tex]\frac{7}{10}[/tex] second, a rotating object makes = [tex]\frac{5}{6}[/tex] revolution
In 1 second, a rotating object makes = [tex]\frac{5}{6}\div\frac{7}{10}[/tex]
[tex]=\frac{5}{6}\times\frac{10}{7} = \frac{50}{42}=1.190\ revolution[/tex]
Therefore, the approximate speed of object is 1.19 revolution per second.
We can also find by, [tex]speed = \frac{distance}{time}[/tex]
[tex]=\frac{5}{6} \div\frac{7}{10} \\=\frac{5}{6} \times\frac{10}{7} =\frac{50}{42} = 1.19[/tex]
We can use any one to solve this type of question:
Finally, the approximate speed is 1.19 revolutions per second.
