Question

Calculate the final velocity of a body which starts from rest acted by a constant acceleration of 2 m/s2 for a time interval of 5 minutes

Answer 1

Explanation:

v=u+at

u=0

a=2m/s square

t=5minutes=300seconds

v=0+2×300

v=600m/s

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Answer 2

Given:

Initial velocity of body, u= 0 m/s

(Since, it starts from rest)

Acceleration of body, a= 2 m/s²

Time taken by body, t= 5 min= 300 s

To Find:

Final velocity of body

Solution:

We know that,

• According to first equation of motion for constant acceleration

$\pink{\boxed{\bf{v=u+at}}}$

where,

v is final velocity of body

u is initial velocity of body

a is acceleration of body

t is time taken of body

$\rule{190}{1}$

Let the final velocity of given body be 'v'

So, on applying first equation of motion on given body, we get

$\longrightarrow\rm{v=u+at}$

$\longrightarrow\rm{v=0+2(300)}$

$\longrightarrow\rm\green{v=600\:m/s}$

Hence, final velocity of given body for the given time interval is 600 m/s.