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3 years ago

Distance travelled by a free falling object in the first second is: a) 4.9m b) 9.8m c) 19.6m d) 10m

Physics

1 answer:

zvonat [6]3 years ago

6 0

Time=1s=t
Acceleration due to gravity=g=9.8m/s^2
Distance=s

In free fall

$\boxed{\sf s=-\dfrac{1}{2}gt^2}$

$\\ \sf\longmapsto s=-\dfrac{1}{2}\times 9.8(1)^2$

$\\ \sf\longmapsto s=-4.9(1)$

$\\ \sf\longmapsto s=-4.9m$

Take it positive

$\\ \sf\longmapsto s=4.9m$

Option a is correct

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