a projectile is thrown with initial velocity $v_{0}$ and angle $30^{o}$ with the horizontal. if it remains in the air for $1 s$ . what was its initial velocity?

19.6 m / s

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9.8 m / s

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4.9 m / s

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1 m / s

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Solution

The correct option is A $9.8 m / s$
Given,
$T = 1 s$
$θ = 30^{0}$
$u = v_{0}$ Initial velocity
Take, $g = 9.8 m / s^{2}$

Time of flight in projectile motion,
$T = \frac{2 u s i n θ}{g}$

$1 = \frac{2 v_{0} s i n 30^{0}}{9.8}$

$v_{0} = \frac{9.8}{2 \times s i n 30^{0}}$

$v_{0} = 9.8 m / s$

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a projectile is thrown with initial velocity v0 and angle 30o with the horizontal. if it remains in the air for 1s. what was its initial velocity?

The correct option is A 9.8m/sGiven,T=1sθ=300u=v0 Initial velocityTake, g=9.8m/s2Time of flight in projectile motion,T=2usinθg1=2v0 sin3009.8v0=9.82×sin300v0=9.8 m/s

a projectile is thrown with initial velocity $v_{0}$ and angle $30^{o}$ with the horizontal. if it remains in the air for $1 s$ . what was its initial velocity?

The correct option is A $9.8 m / s$
Given,
$T = 1 s$
$θ = 30^{0}$
$u = v_{0}$ Initial velocity
Take, $g = 9.8 m / s^{2}$

Time of flight in projectile motion,
$T = \frac{2 u s i n θ}{g}$

$1 = \frac{2 v_{0} s i n 30^{0}}{9.8}$

$v_{0} = \frac{9.8}{2 \times s i n 30^{0}}$

$v_{0} = 9.8 m / s$