Civil Engineering - Applied Mechanics - Discussion

Discussion Forum : Applied Mechanics - Section 1 (Q.No. 12)
12.
A particle moves along a straight line such that distance x traversed in t seconds is given by x = t2(t + 1), the acceleration of the particle, will be
3t3 - 2t
3t2 + 2t
6t - 2
6t + 2
3t - 2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
13 comments Page 2 of 2.

Mohbat Khan Marri said:   8 years ago
t^2(t+1).
=t^3+t^2,
dx/dt=3t^2+2t,
dx^2/dt^2=6t+2.

Shobhit pal said:   5 years ago
X = t^3 + t^2.
dx/dt = 3t^2 + 2t.
dx^2/dt^2 = 6t + 2.
(1)

Narendra Bishwokarma said:   4 years ago
Given:

x=t^2(t+1)=t^3+t^2.
Differentiating on both side
w.r.t. t => dx/dt=3t^2+2t then double differentiation: d^2x/dt^2=6t+2.
(3)


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