A ball is dropped downwards. After 1 second another ball is dropped downwards from same point. dista

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2.Motion in Straight Line

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A ball is dropped downwards. After $1$ second another ball is dropped downwards from the same point. What is the distance between them after $3\, seconds$...........$m$

$25 $

$20 $

$50$

$9.8 $

Solution

(a) Distance between the balls = Distance travelled by first ball in $3$ seconds -Distance travelled by second ball in $2$ seconds $=\frac{1}{2}g\;{(3)^2} – \frac{1}{2}g\;{(2)^2} = 45 – 20 = 25\;m$

Standard 11

Physics

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A ball is dropped downwards. After $1$ second another ball is dropped downwards from the same point. What is the distance between them after $3\, seconds$...........$m$

Solution

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