A boy throws a ball straight up in in the air from a $100 m$ tall building and the ball travels $20 m$ upwards before it starts falling down and comes to rest when it reaches the ground. What are the magnitudes of displacement and distance of the ball?

100 m, 140 m

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120 m, 120 m

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140 m, 120 m

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240 m, 120 m

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Solution

The correct option is A $100 m, 140 m$
$displacement = O B$
$= 100 m$
$distance = O A + A B$
$= 20 + 120$
$= 140 m$

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A boy throws a ball straight up in in the air from a 100m tall building and the ball travels 20m upwards before it starts falling down and comes to rest when it reaches the ground. What are the magnitudes of displacement and distance of the ball?

The correct option is A 100m,140mdisplacement=OB =100mdistance=OA+AB =20+120 =140m

A boy throws a ball straight up in in the air from a $100 m$ tall building and the ball travels $20 m$ upwards before it starts falling down and comes to rest when it reaches the ground. What are the magnitudes of displacement and distance of the ball?

The correct option is A $100 m, 140 m$
$displacement = O B$
$= 100 m$
$distance = O A + A B$
$= 20 + 120$
$= 140 m$