What are the four main elements of matter
2 answers:
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Answer:
R = 1.8 m
Explanation:
This is a simple harmonic movement exercise, at the bottom of the swing the acceleration is vertical upwards and the speed is tangential to the trajectory, that is horizontal; the expression for the centralized acceleration is
= v² / R
R = v² /a_{c}
where the radius is equal to the length of the swing
let's calculate
R = 8.1 / 4.5
R = 1.8 m
Ball hits the floor at 1.6 m below the initial position
So here we can say that
also it will hit at horizontal distance of 5.2 m
let say its velocity in x and y directions are given as
now we can say
from above two equations
as we know that it is projected at an angle of 35 degree
so we know that
now we have
also we can find vertical component of velocity as
now we will find net velocity as
now by energy conservation we can say
so spring constant is 37.2 N/m