A ball rolls horizontally with a speed of 6.4m/s off the edge of a tall platform.
If the ball lands 5.9 m from the point on the ground directly below the edge of the platform, what is the height of the platform?
If the ball lands 5.9 m from the point on the ground directly below the edge of the platform, what is the height of the platform?
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horizontal motion,
time t = 5.9 / 6.4 = 0.9219s
vertical motion,
u=0 ;
s = ut + 0.5 gt^2
s = 0 + 0.5 *9.81 * 0.9219^2
s = 4.168m
answer
height of the platform
time t = 5.9 / 6.4 = 0.9219s
vertical motion,
u=0 ;
s = ut + 0.5 gt^2
s = 0 + 0.5 *9.81 * 0.9219^2
s = 4.168m
answer
height of the platform