Question

gun is mounted on a plateau 960 away from its edge as shown. Height of plateau is 960. The gum can fire shells with a velocity of 100 / at any angle. Of the following choices, what is the minimum distance x from the edge of plateau where the shell of gun can reach?

Answer 1

The minimum distance from the edge of plateau where the shell of gun can reach is 480 m.

Explanation:

Equation of trajectory → ≤  y = x tan 0 - (g x)^(2) / (2 u^(2) (1 + tan^(2) 0)

For p ∮ E y = 0 &

x = 960 m  Right arrow

Now equation of trajectory becomes y = 4 / 3 x x^(2) / 2000 (25/9) For l and ∈ y = -960 m

=> - 960 = 4/3 x - x^(2) / 720

Solving the equation we get

x = 1440

1140 = x - 960 = 480 m

Thus the minimum distance from the edge of plateau where the shell of gun can reach is 480 m.