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`        with what speed must a ball be thrown down for it to bounce 10 m higher than its original level? assume that no enegry loss in striking the ground.`
one year ago

Khimraj
2654 Points
```							Let intial speed is v and initial height of bounce is h½mv2 = mgh    – (1)h = v2/2gLet required velocity be V, then½mV2 = mg(h+10)  – (2)dividing equation (2) by (1)V2/v2 = 1 + 10/hV2 = v2 + (v2)(10*2g/v2)V2 = v2 + 200V = (v2 + 200)1/2 Hope it clears.
```
one year 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