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`        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 ?`
8 months ago

chetan jangir
65 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
```
8 months ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions