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Applications of Horizontal and Vertical Components

A particle is...

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A particle is projected with velocity 20 m/s at an angle of 30º with horizontal. The time when speed of particle is minimum is [g = 10 m/s²]

एक कण को क्षैतिज के साथ 30º कोण पर 20 m/s के वेग से प्रक्षेपित किया जाता है। कण की चाल किस समय पर न्यूनतम है? [g = 10 m/s²]

A

1 s

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B

\sqrt{3} s

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C

2 s

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D

\frac{\sqrt{3}}{2} s

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Solution

The correct option is A 1 s
Solution

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एक प्रक्षेप्य को धरातल से क्षैतिज के साथ 45º कोण पर 20 m/s के वेग से प्रक्षेपित किया जाता है। जब प्रक्षेप्य की चाल न्यूनतम है, तब धरातल से प्रक्षेप्य की ऊँचाई है [g = 10 m/s²]

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एक कण को समय t = 0 पर क्षैतिज के साथ 30° कोण पर 40 m/s चाल से प्रक्षेपित किया जाता है। कण समय t = 0.5 s पर h ऊँचाई पर है। कितने और अधिक समय बाद कण समान ऊँचाई पर होगा?

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