A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of $10 m s^{- 1}$ . If the mass of the bus along with passengers is
10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of $10 m s^{- 1}$ ?

4000 N

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1000 N

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2000 N

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5000 N

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Solution

The correct option is C $2000 N$
Initial velocity, $u = 0$ , final velocity, $v = 10 m s^{- 1}$ , time $t = 50 s e c o n d$ , mass, $m = 10000 k g$ .
We know that, Force , $F$ = $m \frac{v - u}{t}$
$T h e r e f o r e, F = 10000 \times \frac{10 - 0}{50}$
$= 10000 \times \frac{1}{5}$
$\Rightarrow F = 2000 k g m s^{- 2} o r 2000 N$ .
Thus required force = 2000 N

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A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of 10 ms−1. If the mass of the bus along with passengers is 10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of 10 ms−1?

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A bus starts from the rest, accelerates constantly and takes 50 seconds to get the speed of $10 m s^{- 1}$ . If the mass of the bus along with passengers is
10000 kg, calculate the force applied (in N) by the engine of the bus to push the bus to the speed of $10 m s^{- 1}$ ?