A projectile fired from the edge of a 150 m high cliff with an initial velocity of 180 m/s at an angle of elevation of 60˚ with the vertical. Neglecting air resistance find: i) The greatest elevation above the ground reached by the projectile and ii) Horizontal distance from the gun to the point, where the projectile strikes the ground
Answers
Answer:
i .) 254.56°
ii.) 990 m
Explanation:
i.) 180^2 + 180^2 = x^2
32,400 + 32,400 = x^2
64,800 = x^2
√64,800 = √x^2
254.5584412 = x
254.56° = x
ii.) Range = vx . Total time
= 180 . ?
First find the total time:
d = vit + 1/2 at ^2
d= 0t + 1/2 ( 10) t^2
150 = 5t^2
150/ 5 = t^2
t = 5.5 secs
Range = vx . Tt
= 180 . 5.5 secs
= 990 m