Answer:
(a). H = 8.83 m
(b). Rising
Explanation:
Given,
- Initial velocity of the ball = u = 22.6 m/s
- Height of the crossbar = h = 3.05 m
- Distance of the crossbar from the initial position of the ball = r = 36.0 m
- Angle of projection =
- Initial horizontal velocity of the ball =
- Initial vertical velocity of the ball =
part (a)
In the horizontal direction,
Ball is moving with the constant initial velocity of
Let 't' be the time of the ball to reach at the crossbar of distance r.
At time 't', let 'y' be the vertical displacement attained by the ball.
From the equation of kinematics,
Total distance of the ball above the crossbar = H = y - h = 11.88 - 3.05 = 8.83 m
part (b)
At the maximum height, vertical velocity of the ball becomes zero,
Let h be the maximum height attained by the ball.
From the kinematics,
Maximum height attained by the ball with the given initial velocity is 13.92 m but at the crossbar it attains 11.88 m. Hence the ball will still rising approaching the crossbar.
Answer:
Explanation:
As per Doppler's effect of sound the frequency of the sound when source is approaching the observer is given as
similarly when source is moving away from the observer then its frequency is given as
now we know that the ratio of two frequency is
It would be from electrical to kinetic, so i would say a