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Standard XII

Physics

Law of Conservation of Mechanical Energy

A ball is pro...

Question

A ball is projected from a point A with some velocity at an angle $30^{\circ}$ with horizontal as shown in figure. Consider a target at point B. The ball will hit the target. It is thrown with velocity $v_{0}$ equal to

5 m/s

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6 m/s

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7 m/s

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None

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Solution

The correct option is D
None

$A p p l y e q u a t i o n o f t r a j e c t o r y y$

$y = x t a n θ - \frac{g x^{2}}{2 u^{2} c o s^{2} θ}$

$P l a c e x = \frac{\sqrt{3}}{2}, y = 0.5 m$

$a n d θ = 30^{0}$
For no value of $u$ given case is possible.

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A ball is projected from a point A with some velocity at an angle 30∘ with horizontal as shown in figure. Consider a target at point B. The ball will hit the target. It is thrown with velocity v0 equal to

The correct option is D None Apply equation of trajectory y y=x tan θ−gx22u2 cos2 θ Place x=√32 , y = 0.5m and θ=300 For no value of u given case is possible.

A ball is projected from a point A with some velocity at an angle $30^{\circ}$ with horizontal as shown in figure. Consider a target at point B. The ball will hit the target. It is thrown with velocity $v_{0}$ equal to

The correct option is D
None

$A p p l y e q u a t i o n o f t r a j e c t o r y y$

$y = x t a n θ - \frac{g x^{2}}{2 u^{2} c o s^{2} θ}$

$P l a c e x = \frac{\sqrt{3}}{2}, y = 0.5 m$

$a n d θ = 30^{0}$
For no value of $u$ given case is possible.