A ball is horizontally thrown from the top of staircase in such a way

1.	A ball is horizontally thrown from the top of staircase in such a way that it reach to the bottom of last step having height 20 cm and breadth 14 cm then find out initial velocity of body (staircase having six steps).
Answer» HORIZONTAL distance covered by ball =nb Vertical distance covered by ball =nh If the time taken to HIT the edge of nth STEP is t, then nb=ut nh=12gt2 Eliminating t, we GET, nh=12g(nbu)2 n=2hu2gb2 Same as EXAMPLE

A ball is horizontally thrown from the top of staircase in such a way that it reach to the bottom of last step having height 20 cm and breadth 14 cm then find out initial velocity of body (staircase having six steps).

Answer»

HORIZONTAL distance covered by ball =nb

Vertical distance covered by ball =nh

If the time taken to HIT the edge of nth STEP is t, then

nb=ut

nh=12gt2

Eliminating t, we GET,

nh=12g(nbu)2

n=2hu2gb2

Same as EXAMPLE

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A ball is horizontally thrown from the top of staircase in such a way that it reach to the bottom of last step having height 20 cm and breadth 14 cm then find out initial velocity of body (staircase having six steps).​

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A ball is horizontally thrown from the top of staircase in such a way that it reach to the bottom of last step having height 20 cm and breadth 14 cm then find out initial velocity of body (staircase having six steps).