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A child in a car tosses a ball upward so that after release it requires 1/2 second to rise and fall back into the child's hand at the same height from which it was released. The car is traveling at a constant speed of 10 meters / second in the horizontal direction.
• Between release and catch, how far did the ball travel in the horizontal direction?
answer/question/discussion: ->->->->->->->->->->->-> :
If I know the average velocity and the change in time, I can get the displacement. I know the time .5 s, but I need to find the `dv. I am not sure how to get the change in velocity of the vertically thrown ball, if the car is going at 10 m/s.?????
you know that the acceleration of gravity is 9.8 m/s^2 (you can approximate this as 10 m/s^2 for the purposes of this question).
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• As observed by a passenger in the car, what was the path of the ball from its release until the instant it was caught?
answer/question/discussion: ->->->->->->->->->->->-> :
I think that the passenger in the car observed the car going straight up and straight down.
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• Sketch the path of the ball as observed by a line of people standing along the side of the road. Describe your sketch. What was shape of the path of the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
I think it would be a curve from the beginning to the top and back to the beginning.
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• How fast was the ball moving in the vertical direction at the instant of release? At that instant, what is its velocity as observed by a line of people standing along the side of the road?
answer/question/discussion: ->->->->->->->->->->->-> :
I was not sure how fast the ball was moving in the vertical direction. I think that the people standing along the side of the road saw it a lot faster than the child did, because of the moving car.
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• How high did the ball rise above its point of release before it began to fall back down?
answer/question/discussion: ->->->->->->->->->->->-> :
It would be half of the change in displacement, which I was unable to calculate.
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30 Minutes
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You've got a good start.
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Solution
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