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Grade: 12th pass
        
A boy riding on a flat car of a train moving with velocity 10m/s. The boy throws a ball which make 60 degree with the horizontal and the line of track. An observer on the ground observe the ball to rise vertically up . How much does he see to rise the ball up ?
5 months ago

Answers : (1)

chetan jangir
57 Points
							
Answer; 20 m.
Explanation ; the observer on ground will see the the vector sum of velocity this is given by the boy and due to frame in which the ball is moving.We can draw a triangle having hypotenuse at 60 degree and the base having length 10 (showing velocity of car ) we will get the perpendicular length as 10root3 this is upward velocity that observer will see .Now for height of rise V^{2}-U^{^{2}}=2gs.putting v=0,u=10root3 and g=-10 We get s=20m
5 months ago
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