A body is thrown from a …
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Posted by Jatin Yadav 6 years, 8 months ago
- 1 answers
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Jyoti Venkatesh 6 years, 8 months ago
Let h be the height of the tower and t the time taken
u=0 and g= 10m/s2
Using S= ut +1/2 gt2
h= 0+5t2 -----(1)
distance travelled in last 2 seconds is 40 m
again using S= ut +1/2 gt2
h-40= 0+5(t-2)2 -----(2)
subracting 2 from 1
h-h+40= 5(t2 - (t-2)2
8= (t2 - (t-2)2
8= 4t-4
t=3
substituting t in equation 1
h= 5x 3 x 3= 45 m
Height of tower = 45 m
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