Question

A free falling body covers equal distance in last second as covered in first 5

sec.

.)Find height from which it was dropped​

Answer 1

Answer:

Displacement in the nth second of the free fall is

S

n

th

=

2

1

g(t

1

2

−t

2

2

)

Given that (t

n

−t

n−1

)=1

Displacement in 3 seconds of the free fall

S=

2

1

gt

2

S=

2

1

×10×3

2

S=45m

Given that: S

n

th

=45

On solving that we get:

t

1

=5sec