Applied Mechanics and Graphic Statics
The displacement of a particle which moves along a straight line is given by S = 4t³ + 3t²- 10 where ‘S’ is in meters and t is in seconds. The time taken by the particle to acquire a velocity of 18 m/sec from rest, is

1.2 sec
½ sec
1 sec
1.5 sec

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Applied Mechanics and Graphic Statics
Free body diagram is an

None of these
Isolated joint with all the forces, internal as well as external, acting on it
Isolated joint with internal forces acting on it
Isolated joint with only body forces acting on it

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