A ball is thrown upward with a velocity of 100 m/s. Calculate the value of time taken by it , when it returns to the ground. (Take g=10 ms-२)
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20sec...
Explanation:
...
use equation v=u+gt
now at top final velocity that is v= 0
0=100-10t ( g is working downward opposite to motion)
-100= -10t
100=10t
t =10 sec
But time of upward movement and equal time of downward movement so the total time will become 2t that is equal to = 2×10=20 seconds...
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