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GrogVix [38]
2 years ago
6

A cannonball is launched with initial velocity of magnitude v0 over a horizontal surface. At what minimum angle

Physics
1 answer:
melisa1 [442]2 years ago
4 0

Answer:

A)   θmin= 76°.

Explanation:

Given that

Speed of cannonball = Vo

Lets take θ is the angle measure from horizontal

We know that

Range R

R=\dfrac{V_o^2sin2\theta }{g}

Height h

h=\dfrac{V_o^2sin^2\theta }{2g}

Given that h should be larger than R

         h > R

\dfrac{V_o^2sin^2\theta }{2g}>\dfrac{V_o^2sin2\theta }{g}

{sin^2\theta }>2{sin2\theta }

{sin^2\theta }>4{sin\theta\ cos\theta  }

{tan\theta }>4

        θ  >75.96°

So minimum angle should be 75.96° or 76°.

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