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F=ma

A force F1 ...

Question

A force $F_{1}$ acts on a particle to acclerate it from rest to a velocity v. The force $F_{1}$ is then replaced by force $F_{2}$ which of the following statements is true ?

F_{1} m u s t b e e q u a l t o F_{2}

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F_{1} m a y b e e q u a l t o F_{2}

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F_{1} m u s t b e u n e q u a l t o F_{2}

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Solution

The correct option is B $F_{1} m a y b e e q u a l t o F_{2}$
The force $F_{1}$ is replaced by force $F_{2}$ there may be two possibilities either $F_{2}$ is greater or equal to $F_{1}$ . because we don't have given the second option.
hence, $F_{1}$ may be equal to $F_{2}$ .

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