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A ball is thrown vertically download with velocity 5 metre per second from the top of the tower with what velocity should another ball be thrown vertically down after 2s from the top of the same tower so that it can hit the first ball in further 2 s .
A ball is thrown vertically download with velocity 5 metre per second from the top of the tower with what velocity should another ball be thrown vertically down after 2s from the top of the same tower so that it can hit the first ball in further 2 s .

```
4 years ago

Vikas TU
14149 Points
```							at 2s for first ball,h = 5*2 + 0.5g*4 = > 30 meter.and v = 5 + 10*2 = > 25 m/safter further 2 seconds,x= 25*2 + 0.5*g*4 = > 70 meter.total distance it covered, => 70 + 30 => 100 meter.for second ball,100 = u*4 + 0.5g*164u = 100 – 80 = 204u = 20u = 5 m/s
```
4 years ago
Prabhav Sharma
23 Points
```							but answer given is 40m /s.(1)40m/s(2)55m/s(3)15m/s(4)25m/splease check answer .thanks----------------------------------------------------------------------------------------------------------------------------------------------------------------
```
4 years ago
Vikas TU
14149 Points
```							Edit:the second ball needs to cover that 100 m distance in 2 seconds not in 4.Therefore,100 = u*2 + 0.5*g*4u = 40 m/s
```
4 years 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