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Physics
Motion of a particle is given by equation s = (3t3+7t2+14t+8) m. The value of acceleration of the particle at t = 1 sec is
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Q. Motion of a particle is given by equation $s = (3t^3+7t^2+14t+8)\, m.$ The value of acceleration of the particle at $t = 1\ sec$ is
AIPMT
AIPMT 2000
Motion in a Straight Line
A
$10\, m/s^2$
4%
B
$32\, m/s^2$
84%
C
$23\, m/s^2$
8%
D
$16\, m/s^2$
5%
Solution:
$\, \, \, \frac{ds}{dt}=9t^2+14t+14$
$\Rightarrow \frac{d^2s}{dt^2}=18t+14=a$
$ \, \, \, a_{t=1} = 18 \times 1 + 1 4 = 32\, m/s^2$