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Standard XII

Physics

Equations of Motion

An object wit...

Question

An object with a mass of $10 k g$ moves at a constant velocity of $10 m / s$ . A constant force then acts for $4 s e c$ on the object and gives it a speed of $2 m / s e c$ in opposite direction. The acceleration produced in it is,

10 m / s^{2}

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5 m / s^{5}

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- 3 m / s^{2}

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7 m / s^{2}

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Solution

The correct option is C $- 3 m / s^{2}$
Change in velocity
$- 2 - 10 = - 12$
Time required is $4$ seconds
$a = Δ v / t$
$= - 12 / 4$
$= - 3 m / s ²$
Hence,
option $C$ is correct answer.

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An object with a mass of 10kg moves at a constant velocity of 10m/s. A constant force then acts for 4sec on the object and gives it a speed of 2m/sec in opposite direction. The acceleration produced in it is,

The correct option is C −3m/s2Change in velocity −2−10=−12Time required is 4 seconds a=Δv/t=−12/4=−3m/s²Hence,option C is correct answer.

An object with a mass of $10 k g$ moves at a constant velocity of $10 m / s$ . A constant force then acts for $4 s e c$ on the object and gives it a speed of $2 m / s e c$ in opposite direction. The acceleration produced in it is,

The correct option is C $- 3 m / s^{2}$
Change in velocity
$- 2 - 10 = - 12$
Time required is $4$ seconds
$a = Δ v / t$
$= - 12 / 4$
$= - 3 m / s ²$
Hence,
option $C$ is correct answer.