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serg [7]
3 years ago
7

a ball is projected with a certain angle with initial velocity u. it covers horizontal range R. With what initial velocity it mu

st be projected keeping the angle of projection same so its horizontal range becomes 2.25R
Physics
1 answer:
Elena L [17]3 years ago
8 0

Answer:

1.5 u

Explanation:

The range equation is:

R = u² sin(2θ) / g

When u = v, R = 2.25 R.

2.25 R = v² sin(2θ) / g

2.25 u² sin(2θ) / g = v² sin(2θ) / g

2.25 u² = v²

1.5 u = v

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