First slide

Projection Under uniform Acceleration

Question

It is possible to project a particle with a given speed in two possible ways so that it has the same horizontal range 'R'. The product of time taken by it in the two possible ways is

Moderate

A

R/g
B

2R/g
C

3R/g
D

4R/g

Solution

R same ⇒ angles are θ and 90-θ
$\large \therefore T_1\;T_2=(\frac{2usin\theta}{g})(\frac{2ucos\theta}{g})=\frac{2R}{g}$

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