Question

A body is thrown vertically upwards. Which one of the following graphs correctly represent the velocity
vs time?
All the graphs below are intended to represent the same motion. pls explain also ​

Answer 1

Answer:

Graph No 1 Represent The Velocity

Answer 2

Explanation:

Velocity of body thrown vertically upwards

$v </p><p>f</p><p> </p><p> =v </p><p>i</p><p> </p><p> +at$

where a=−g (always acts in downward direction)

$∴v </p><p>f</p><p> </p><p> =v </p><p>i</p><p> </p><p> −gt$

at

$t= </p><p></p><p>\frac{vi}{g} </p><p>$

, we get

$v </p><p>f</p><p> </p><p> =0$

for

$v </p><p>f</p><p> </p><p> t> </p><p>g</p><p>v </p><p>i</p><p> </p><p> </p><p> </p><p> , v </p><p>f$

is negative.

also slope of v

$v </p><p>f$

slope =

$</p><p> </p><p> </p><p>\frac{ - g}{vi}$

(negative)

Hence option (4) is correct.

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