A hockey ball initially moving at 25m per second is acted upon by a constant retardation of 2.5 m per second ² for how long will the ball roll before coming to rest
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u=25m/s
a=-2.5m/s² (since body is retarding that is slowing down uniformly)
v=0(since body comes to rest after some time)
t=?
use newton's furst eq.
v=u+at
0=25-2.5t
2.5t=25
t=25/2.5
t=10 sec.
a=-2.5m/s² (since body is retarding that is slowing down uniformly)
v=0(since body comes to rest after some time)
t=?
use newton's furst eq.
v=u+at
0=25-2.5t
2.5t=25
t=25/2.5
t=10 sec.
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