Engineering Mechanics
A particle moves along a straight line such that distance (x) traversed in 't' seconds is given by x = t² (t - 4), the acceleration of the particle will be given by the equation

3t² + 2t
6f - 8
6f - 4
6t² - 8t

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Engineering Mechanics
According to Newton's first law of motion,

None of these
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
To every action, there is always an equal and opposite reaction
Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force

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