Awild pig attacks a hunter with a velocity of 5 m/s. at the instant when the pig is at a distance of 100 m the hunter shoots an arrow with an angle of 40° above the horizontal. what is the initial velocity of the arrow to kill the wild pig?

31.55 m/s

Explanation:

Let the initial velocity of the arrow is u metre per second.

Angle of projection, θ = 40 degree

range = 100 m

Use the formula for the range.

100 = u^2 Sin(2 x 40) / 9.8

100 x 9.8 = u^2 Sin 80

u^2 = 995.11

u = 31.55 m/s

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