Choose the correct answer figure which will make a complete square on joining with the problem figure.
In figure-completion questions, always check:• Direction of steps • Number of projections • Exact mirror or rotational fit
A particle is moving in a straight line. The variation of position $ x $ as a function of time $ t $ is given as: $ x = t^3 - 6t^2 + 20t + 15 $. The velocity of the body when its acceleration becomes zero is: