Physics
posted by Jen
A baseball is seen to pass upward by a window 24 m above the street with a vertical speed of 8 m/s. The ball was thrown from the street.
(a) What was its initial speed?
(b) What altitude does it reach?
(c) How long after it was thrown did it pass the window?

drwls
(a) Try using conservation of energy
Mg*(24 m)+(1/2)M*(8 m/s)^2 = (1/2) M Vo^2
Cancel out the M's and solve for Vo.
2) Vo^2/(2 g)
3) How long does it take the velocity to go from Vo to 8 m/s?
(Vo 8)= g t
Solve for t
Respond to this Question
Similar Questions

physics
A baseball is seen to pass upward by a window 27 m above the street with a vertical speed of 12 m/s. The ball was thrown from the street. (a) What was its initial speed? 
physics
A baseball is seen to pass upward by a window 29 m above the street with a vertical speed of 15 m/s. The ball was thrown from the street.After how many more seconds does it reach the street again? 
Physics Correction
You drop a ball from a window on an upper floor of a building and it is caught by a friend on the ground when the ball is moving with speed vf. You now repeat the drop, but you have a friend on the street below throw another ball upward … 
Physics
A. A baseball is seen to pass upward by a window 28.1 m above the street with a vertical speed of 13.7 m/s. If the ball was thrown from the street, what was its initial speed? 
Physics
A ball thrown by a boy in the street is caught 5 s later by another boy on the balcony of the house 10 m away and 3 m above the street level. What is the initial speed of the ball? 
Physics
A ball is thrown vertically upward with an initial speed of 11 m/s . Then, 0.67 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 25 m/s . How far above the release point will … 
Physics
A baseball traveling upward passes a window 28.0 m above the street with a vertical speed of 13.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? 
physics
A ball is thrown vertically upward with an initial speed of 25 m/s. Then, 1.8 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 32.1 m/s . How far above the release point will … 
physics
A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? 
Physics
A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches?