Given that the initial velocity of a body is u and after t s its final velocity is v, then, what equation can we use to calculate deceleration?

a = \frac{v + u}{t}

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a = \frac{v - u}{t}

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a = \frac{u - v}{t}

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a = \frac{t}{v - u}

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Solution

The correct option is B $a = \frac{v - u}{t}$
Since the initial velocity, final velocity and time are given, we can use the first equation of motion, i.e. $v = u + a t$ ,
Therefore, $a = \frac{v - u}{t}$

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Given that the initial velocity of a body is u and after t s its final velocity is v, then, what equation can we use to calculate deceleration?

The correct option is B a=v−ut Since the initial velocity, final velocity and time are given, we can use the first equation of motion, i.e. v=u+at, Therefore, a=v−ut

The correct option is B $a = \frac{v - u}{t}$
Since the initial velocity, final velocity and time are given, we can use the first equation of motion, i.e. $v = u + a t$ ,
Therefore, $a = \frac{v - u}{t}$