The next three questions refer to the picture at below and the following problem. A man on a ledge throws a ball towards a person running away at 3 m/s. The initial velocity of the ball is 5 m/s in a direction 30 degrees above the horizontal. The ball hits the person on the head. Use the dimensions and the coordinate axis shown on the picture (do not change the coordinates axis)
(i) Which graph below best describes the y-position of the ball as a function of time–
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
(i)
where y 0 = 9.8 m.
This is parabola opening downward
(ii) v y = u y + a y t
v y = u sin θ – gt
This is straight line with negative slope
(iii) y = y 0 + u y t + 
a y t 2
2 = 9.8 + (5gm 30º) t – 
gt 2
.
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