(a) A body P of mass 5kg is suspended by two light inextensible strings AP and BP attached to a ceiling. If the strings are inclined at angles 40° and 30° respectively to the downward vertical, find the tension in each of the strings. [Take $g=10m{s}^{-2}$].
(b) A constant force F acts on a toy car of mass 5 kg and increases its velocity from 5 ms${}^{-1}$ to 9 ms${}^{-1}$ in 2 seconds. Calculate :
(i) the magnitude of the force ; (ii) velocity of the toy car 3 seconds after attaining a velocity of 9 ms${}^{-1}$.


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