To solve this problem it is necessary to apply the concepts related to the kinematic equations of angular motion.
By definition, acceleration can be expressed as the change in angular velocity squared over a given period of distance traveled.

where,
Angular velocity
Angular displacement.
In turn, as a function of time, we can represent it as,

For our case we have to,


PART A) In the case of angular acceleration we have to,



PART B) Through the definition of angular acceleration as a function of time we can calculate it,




Answer:
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I think it is maria but i am more sure than wondering
Answer:
Detailed explanation:
Density of water=1000kg/m³
Hence mass of water displaced is:
m=d×v
=1000kg/m³×(4.3×10^-3)m³ (volume of water displaced converted to L)
=4.3 kg of water
Hence, mass of football is also 4.3 kg(Archimedes principle)
Thus density of football
=mass÷volume
substitute the mass and volume and solve.
hope this helps
Answer:
The value is 
Explanation:
From the question we are told that
The height is h = 2.0 m
The height of the window is 
The initial velocity of the rock is 
The angle at which it is thrown is 
Generally the vertical component of the velocity of the stone is mathematically represented as

=>
Generally the height of the window from the ground is mathematically represented as using kinematic equation as

=> 
Here g is negative -9.8 m/s^2 because the direction of the stone is against gravity
So

Solving this quadratic equation using quadratic formula we obtain
t = 0.770 s
Generally the velocity of the stone on the x axis is mathematically represented as

=> 
Generally the distance between the person throwing the rock and the window is mathematically represented as

=> 
=> 