Question

A stone projected at angle theta with horizontal from the roof of a tall building falls on the ground after 3 second to second after the projection it was again and the level of projection then the

Answer 1

TAC = 2 sec.

So,

(2u sinx)/g = 2 => u sinx = g = 10 m/s

Now,

y = uyt + 1/2 ayt2 ==>– h = u sinx × 3 -1/2 g × 32

=> –h = 10 × 3 -1/2 × 10 × 9
=> – h = 30 – 45
=> h = 45 – 30 = 15 m