Question

A ball is dropped from a height.If it takes is to
Cross the Last 55m before
hiting the ground.Find the height from
which it was dropped​

Answer 1

Answer:

Ans. S= 180m.

Explanation:

BC−

S=v

1

t+

2

1

gt

2

55=v

1

×1+

2

1

×10×1

v

1

=50ms

−1

so

v

2

=v

1

+gt

v

2

=50+10×1=60ms

−1

AC−

v

2

2

−u

2

=2gS

60

2

=2×10S

S=180m

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