Question

A body is moving with an initial velocity of 5m/sec accelreates at 1m/s2. Its initial velocity after 5 sec

Answer 1

SOLUTION:

Given

u(intial velocity) =5m/s

a(acceleration) =1m/s²

• t(time) = 5 sec

v(vel. after 5 sec) = u + at

= 5 + 1*5

=10 m/s

Velocity after 5 sec= 10m/s

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Answer 2

A body is moving with an initial velocity of 5m/sec accelreates at 1m/sec^2.

GIVEN

u = 5m/sec

a = 1m/sec^2

t = 5 sec

TO FIND :- Final velocity ( v )

SOLUTION

$a = \frac{(v - u)}{t} \\ \\ \\ \implies 1 = \frac{(v - 5)}{5} \\ \\ \\ \implies 5 = \frac{(v - 5)}{1} \\ \\ \\ \implies \boxed{v = 10}$

Therefore, the velocity after 5sec is 10m/sec.

* VELOCITY means the displacement by the body per unit time. It is a vector quantity due to which it depends on both magnitude and direction . Its unit is m per second.

*ACCELERATION refers to change in velocity per unit time . Its unit m per second square. When velocity decreases it leads to negative acceleration or retardation where final velocity is less than the initial one.