Bob creates an instrument that is able to play C4 (261.63 Hz). He does some analysis with the sound equipment and it shows that
1 answer:
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Ans: R = Ball Travelled = 92.15 meters.
Explanation:
First we need to derive that formula for the "range" in order to know how far the ball traveled before hitting the ground.
Along x-axis, equation would be:
Since there is no acceleration along x-direction; therefore,
Since
and 
=0; therefore above equation becomes,
--- (A)
Now we need to find "t", and the time is not given. In order to do so, we shall use the y-direction motion equation. Before hitting the ground y ≈ 0 and a = -g; therefore,
=>
=>
Since
; therefore above equation becomes,
Put the value of t in equation (A):
(A) =>
Where x = Range = R, and
; therefore above equation becomes:
=>
Now, as:
and
°
and g = 9.8 m/(s^2)
Hence,
Ans: R = 92.15 meters.
-i
Explanation:
First we need to derive that formula for the "range" in order to know how far the ball traveled before hitting the ground.
Along x-axis, equation would be:
Since there is no acceleration along x-direction; therefore,
Since
Now we need to find "t", and the time is not given. In order to do so, we shall use the y-direction motion equation. Before hitting the ground y ≈ 0 and a = -g; therefore,
=>
=>
Since
Put the value of t in equation (A):
(A) =>
Where x = Range = R, and
=>
Now, as:
and
and g = 9.8 m/(s^2)
Hence,
Ans: R = 92.15 meters.
-i
The work done in lifting the hamburger is equal to the increase in gravitational potential energy of the hamburger, given by
where
m=0.1 kg is the mass of the hamburger
is the gravitational acceleration
is the increase in height of the hamburger
Substituting numbers into the equation, we find
So, the correct answer is
(3) 0.3 J