Question

24. A projectile is thrown with speed 40 ms-1 at angle o
from horizontal. It is found that projectile is at same
height at 1s and 3 s. What is the angle of projection?


(1) tan-1
1
13
(2) tan
(3) tan-'(13)
(4) tan (2)​

Answer 1

Answer:

Answer:Theta = 30°

Explanation:

T = t1 + t2

2u sin Φ

-------------- = 1 + 3

g

2 x 40 sin Φ

------------------ = 4

10

SinΦ = 1/ 2

Φ = 30°

Answer 2

Answer:

what type of question is this

I can't understand

it is very difficult