position of particle is given by x=3t-9. Find the time when particle crosses origin
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1
Answer:
t=3 second
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Answered by
1
Answer:
ANSWER
The position of a particle moving along x-axis is given by
x=(−2t
3
+3t
2
+5)m
Velocity, v=
dt
dx
=0
−6t
2
+6t=0. . . . . . .(1)
6t(−t+1)=0
−t+1=0
t=1sec
Acceleration, a=
dt
dv
a=−12t+6
a∣
t=1sec
=−12×1+6
a∣
t=1sec
=−6m/s
2
T
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