18. An object dropped from a certain height reaches the ground in 1 second.
Assuming there is no gravity, with what velocity (m/s) must the object be thrown so that it takes
the same time to reach the ground?
(Acceleration due to gravity=10 m/s)
{a) 5
(c)3
(b) 4.9
(d) 2
Answers
Answered by
8
Answer:
a) 5
Explanation:
u= 0
t= 1sec
a= 10m/s
s= ut+1/2 at2
= 0+5
s=5
a= 0
t= 1s
s= 5m
u= ?
s= ut+ 1/2at2
5= u+ 0
u= 5m/s
BOOM
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