Question

the velocity of amoving object change from 20metre per second 60metre per second in 10 seconds calculte it's accelration
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Answer 1

To Find :

$\tt{the \: accelelaration \: of \: the \: body}$

Given :

$\bull \: \tt{initial \: velocity = 20 \: m \: per \: sec}$

$\bull \: \tt{final \: velocity = 60 \: km \: per \: sec}$

$\bull \: \tt{time \: = 10 \: sec}$

Formula to be applied :

$\bull \tt{formula \: of \: acceleration}$

$\tt{acceleration = \frac{v - u}{t}}$

$\tt{where, }$

$\tt{v = final \: velocity }$

$\tt{u = initial \: velocity}$

$\tt {t = time}$

Solution :

$\tt{initial \: velocity = 20 \: mps} \\ \tt{final \: velocity \: = \: 60 \: mps }$

$\tt {so \: acceleration = \frac{v - u}{10} }$

$\implies \tt{acceleration = \frac{60 - 20}{10} }$

$\implies \tt{acceleration = \frac{ \cancel{40}}{ \cancel{10}} }$

$\implies \tt{acceleration = 4 \: m \: per \: se {c}^{2} }$

hence, Acceleration = 4 m/s²

Additional Information :

• Final Velocity = u + at
• Initial Velocity = v-at
• t = v-u/a

Equations of motion :

• v = u+at
• s = ut + ½ at²
• 2as = v²-u²