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स्थिर शक्ति देने वाली मशीन के द्वारा एक पिण्ड को सरल रेखा के अनुदिश चलाया जाता है। समय t में पिण्ड द्वारा चली गई दुरी अनुक्रमानुपाती है:
A. `t^(1//2)`
B. `t^(3//4)`
C. `t^(3//2)`
D. `t^(2).`

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Best answer
Correct Answer - C
`P=(W)/(t)=(Fxx x)/(t)=Fv` (स्थिर)।
परन्तु F = m a तथा v = a t.
`therefore Fv=maxxa t = ma^(2)t.` अतः `a^(2)t` नियतांक |
अब `s=(1)/(2)a t^(2)." "therefore s^(2)=(1)/(4)a^(2)t^(4)=(1)/(4)(a^(2)t)t^(3)`
अथवा `s^(2)prop t^(3)` अथवा `s prop t^(3//2)`.

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