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Standard XII

Physics

Acceleration

A particle co...

Question

A particle covers $150 m$ in $8 t h$ second starting from rest, its acceleration is:

15 m / s^{2}

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20 m s^{2}

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10 m / s^{2}

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8 m / s^{2}

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Solution

The correct option is B $20 m s^{2}$
Given,
$S_{8} = 150 m$
$u = 0 m / s$
$a = ?$

The distance covered in $8^{t h} s e c$ is
$S_{n} = u + \frac{a}{2} (2 n - 1)$

$S_{8} = 0 + \frac{a}{2} (2 \times 8 - 1)$

$150 = \frac{15 a}{2}$

$a = 20 m / s^{2}$
The correct option is B.

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A particle covers 150 m in 8thsecond starting from rest, its acceleration is:

The correct option is B 20ms2Given,S8=150mu=0m/sa=?The distance covered in 8thsec isSn=u+a2(2n−1)S8=0+a2(2×8−1)150=15a2a=20m/s2The correct option is B.

A particle covers $150 m$ in $8 t h$ second starting from rest, its acceleration is:

The correct option is B $20 m s^{2}$
Given,
$S_{8} = 150 m$
$u = 0 m / s$
$a = ?$

The distance covered in $8^{t h} s e c$ is
$S_{n} = u + \frac{a}{2} (2 n - 1)$

$S_{8} = 0 + \frac{a}{2} (2 \times 8 - 1)$

$150 = \frac{15 a}{2}$

$a = 20 m / s^{2}$
The correct option is B.