1) Two velocities are moving in such direction that the angle between them is 30°. The two velocities are having magnitudes 15 m/s and 25 m/s respectively. Calculate the magnitude of resultant velocity. (Marks: 02) - Published on 19 Oct 15

Where, w = magnitude of resultant velocity u = magnitude of first velocity v = magnitude of second velocity a = angle between first and second velocity

2) An object of 1 kg is attached to the string at the height of 100 m from the ground. What is the velocity of the object when it impacts on the ground, if it is released from string at 100 m? Take acceleration due to gravity g=9.8 m/s^{2} (Marks: 02) - Published on 19 Oct 15

Explanation: No other than gravitational force is acting upon the object. Thus by using motion equation v^{2} = u^{2}+ 2as and taking initial velocity of the object u = 0, we can get the final velocity that is 44.27 m/s.