Physics question, finding distance
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Physics question, finding distance

[From: ] [author: ] [Date: 12-05-11] [Hit: ]
initial speed = 0 v, final velocity = ? s, distance = ?=> s = (0)(4) + [ (1/2) (9.Now,......
a student dropped a baseball from rest from the roof of a building. the ball took 4.0 seconds to reach the ground. how far did the ball fall

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If t = 4 seconds
a = gravity = 9.8 m/s^2
u, initial speed = 0
v, final velocity = ?
s, distance = ?

Using an equation of motion:

=> s = (u)(t) + [ (1/2) (a) (t^2) ]

=> s = (0)(4) + [ (1/2) (9.8) (4)^2]

Now, 'ut' falls out because u = 0

=> s = (1/2) (9.8) (16)

=> s = 78.4 meters
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