a body falls from 80m its time of descent is ? [when g=10m/s2]
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Here, the formula is S is equal to ½ g x t (square) added to i x t
In this case, u is equal to 0
And we have to find t or time
Then the formula would be 80 equal to ½ (10) x t square
T square is 16
So t will be 4 seconds
In this case, u is equal to 0
And we have to find t or time
Then the formula would be 80 equal to ½ (10) x t square
T square is 16
So t will be 4 seconds
Answered by
1
Answer:
Distance travelled(h) = 80 m
g = -10 m/s2
Initial velocity of the body= u
by third equation of motion i.e.
2gh= v2- u2 ( v = 0 as body finally comes to rest)
u or initial velocity = 40 m/s
Now,
By first equation of motion
v = u + gt
0 = 40 - 10t
t = 4 seconds
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