When a body starts from rest, the acceleration of the body after 2 seconds is _______
of its displacement. (half, twice, four times, one-fourth)
TNSCERT Class 9 General Science Ch 6 Motion
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29
half
cuz acceleration=displacement/time
cuz acceleration=displacement/time
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3
Explanation:
Let s is the displacement of the body. The formula that relates the acceleration, displacement and the velocity is given by :
The body is at rest initially, u = 0. Put t = 2 sec in above formula as :
So, when a body starts from rest, the acceleration of the body after 2 seconds is half of its displacement. Hence, this is the required solution.
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