Question

A boy released a ball from the top of a building.It will clear a window 2m hight at a distance 10m below the top in nearly​

Answer 1

Answer:

it will come in 0.13

PLZ MARK AS BRAIN LIST PLZ

Answer 2

Answer:

the answer is 0.13 second

EXPLANATION:-

1st part

u=0

s=10m

v=?

taking acceralation= 9.8m/s²

v²-u²=2as

v²-0²=2×9.8×10

v²=196

v=14m/s²

Now,

for second part

s=2m (height of the window)

u=14m/s² (calculated above)

v=0

s= ut+1/2gt²

2=14t+1/2×9.8×t²

2=4.9t²+14t

0=4.9t²+14t-2

solving this equation, we get:-

t=0.13s approx.

hence time taken by the ball to clear the window is 0.13 second