5. A boy is running along positive x-axis with 8 m/s. While running he manages to throw a stone in a plane perpendicular to his direction of running with velocity 12 m/s at an angle 30° with vertical. Find the speed of the stone at the highest point of the trajectory.
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Explanation:
The time taken by a person to
cover 150 km was 2. 1/2 hours
more than the time taken in the
return jourrney. If he returned at a
speed of 10 km/hour more than the
speed while going, find the speed
per hour in each direction.
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