Physics

Problem

A ball is thrown with an initial speed of

25\,\text{m\,s}^{-1}

and is required to land back at the same horizontal level

35\,\text{m}

away. Take

g=9.8\,\text{m\,s}^{-2}

. Which statement about the possible projection angle(s) is correct? a) No real projection angle is possible because the required range exceeds the maximum range for

25\,\mathrm{m\,s^{-1}}

.\ b) Only one projection angle of

45^{\circ}

can satisfy the requirement.\ c) Exactly two distinct projection angles (

\approx16.7^{\circ}

and

\approx73.3^{\circ}

) can satisfy the requirement.\ d) Two projection angles close to

26.6^{\circ}

and

63.4^{\circ}

will satisfy the requirement.\

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