Three balls of same masses are projected with equal speeds at angle 15^{circ}, 45^{circ}, 75^{circ}

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3-2.Motion in Plane

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Three balls of same masses are projected with equal speeds at angle $15^{\circ}, 45^{\circ}, 75^{\circ}$, and their ranges are respectively $R_1, R_2$ and $R_3$, then

A$R_1 > R_2 > R_3$

B$R_1 < R_2 < R_3$

C$R_1=R_2=R_3$

D$R_1=R_3 < R_2$

Solution

(d)
At $45^{\circ}$ range is maximum. At $15^{\circ}$ and $75^{\circ}$ ranges are equal as $R_\theta=R_{\left(90^{\circ}-\theta\right)}$

Standard 11

Physics

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