Applied Mechanics and Graphic Statics
If a projectile is fired with an initial velocity of 10 m/sec at an angle of 60° to the horizontal, its horizontal and vertical velocity at the highest point of trajectory are

5 and 5√3 m/sec
5√3 m/sec and 0
5 m/sec and 0
0 and 5 m/sec

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Applied Mechanics and Graphic Statics
The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is ½, the velocities of separation of the balls will be equal to

Original velocity in the opposite direction
Original velocity in the same direction
Half the original velocity in the same direction
Half the original velocity in the opposite direction

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