A ball is dropped from a cliff. The time duration which it covers a distance of 490m is
(A) 4.9 sec
(B) 9.8 sec
(C) 10 sec
(D) 100 sec
Answers
Answered by
0
Answer:
options number (a) is the answer In this question
Answered by
0
Answer:
7sec
Explanation:
s=490m
u=0
a=10ms^-2
s=ut+at^2
490=0+10*t^2
49=t^2
t=7sec
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