Question

From a 10m high building a stone ‘A’ is dropped &
simultaneously another stone ‘B’ is thrown horizontally with
an initial speed of 5 m/sec⁻¹. Which one of the following
statements is true?
(a) It is not possible to calculate which one of two stones
will reach ground first
(b) Both stones ‘A’ & ‘B’ will reach the ground
simultaneously.
(c) ‘A’ stones reach the ground earlier than ‘B’
(d) ‘B’ stones reach the ground earlier than ‘A’

Answer 1

ANSWER ::

The answer is

(b) Both stones ‘A’ & ‘B’ will reach the ground

(b) Both stones ‘A’ & ‘B’ will reach the groundsimultaneously.

EXPLANATION ::

Since in both case the height of building and downward acceleration g is same. So both stones reach simultaneously i.e.,

From second kinematic equation, S=ut+ (1/2) gt²

Now u = 0 gives

S= (1/2) gt²

S = 10 gives

⇒10= (1/2) gt²

So

t = √ (20/g) s

for both stone.

Please check it

Mark it Brainlist

FOLLOW ME

THANK YOU