Question

position of particle is given by x=3t-9.find the time when particle crosses the origin
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Answer 1

Explanation:

GIVEN THAT,

TIME WHEN CROSSES ORIGIN,WHICH MEANS,

X=0

SO SUBSTITUTING,

0 = 3t - 9

THEREFORE, t = 3 seconds.

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Answer 2

Answer:

The time when particle crosses the origin is 3sec

Explanation:

Given the position of a particle, $x=3t-9$

When particle crosses the origin, $x=0$

Then the time, when particle crosses the origin is

                                        $3t-9=0$

                                       $\implies 3t=9\implies t=\frac{9}{3} =3s$

The time when particle crosses the origin is 3sec