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Q.

A body is allowed to fall from a height of 100 m. If the time taken for the first 50 m is t1 and for the remaining 50 m is t2.Which is correct?The ratio of t1 and t2 is nearlyThe ratio of times to reach the ground and to reach first half of the distance is

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a

t1=t2

b

t1>t2

c

t1

d

Depends upon the mass

e

5:2

f

3:1

g

3:2

h

5:3

i

3:1

j

2:1

k

5:2

l

1:3

answer is , , .

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Detailed Solution

s=12gt12  or  t12=50×2g=100g  or  t1=10g and 100=12gt2  or  t=102gt2=t−t1=10g(2−1)=0.4t1 t1>t2t1:t2=10g×g10(2−1)=10.4=104=52t:t1=102g×g10=2
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