Question #51236

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Question #51236

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Answer 1 · 2016-10-19T18:34:05

(a)

Explanation:

We are required to find out the force.

We know that
Force $F = m a$ $F=ma$ .
Mass $m$ $m$ is given.
What we need to find is acceleration $a$ $a$ from the given data.

Kinematic equation connecting given quantities is
$s = u t + \frac{1}{2} a t^{2}$ $s=ut+1/2at^2$
Inserting given values we get
$s = 0 \times t + \frac{1}{2} a t^{2}$ $s=0xxt+1/2at^2$
$\Rightarrow \frac{1}{2} a t^{2} = s$ $=>1/2at^2=s$
Solving for $a$ $a$
$a = \frac{2 s}{t^{2}}$ $a=(2s)/t^2$
$:.$ Force $F=mxx(2s)/t^2$
$F=(2ms)/t^2N$

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Question #51236

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