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Equation of Motion of Free Fall

A ball is thr...

Question

A ball is thrown vertically upwards with a speed of $30 m s^{- 1}$ . The equation for velocity is (Take g= $10 m s^{- 2}$ )

v = 30 + 10 t

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v = 30 - 10 t

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v = - 10 t

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v = 10 t

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Solution

The correct option is C $v = 30 - 10 t$
$u = 30 m s^{- 1}; g = - 10 m s^{- 2}$
$v = u + g t$
$v = 30 - 10 t$ (As g acting downward so g $= - 10 m s^{- 2})$
hence,option B is correct.

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Similar questions

A C

V = 100 sin (10 t)

I = 4 sin (10 t - π / 4)

v

v = 5 t^{2} + 20 t - 60

v

t

y_{1} = 4 sin (10 t + ϕ)

y_{2} = 5 cos 10 t .

y_{1} = 4 sin (10 t + ϕ)

y_{2} = 5 cos (10 t)

{10 m s}^{- 1}

{30 m s}^{- 1}

(T a k e g = {10 m s}^{- 2})

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