Question

A body starts moving from rest with an acceleration of 4m/s. find velocity after 4 second?

Answer 1

here's your answer ⭐⭐

Answer 2

$\blue{\bold{\underline{\underline{Answer:}}}}$

$\green{\therefore{\text{Final\:velocity=16\:m/s}}}$

$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

• In the given question information given about a car initially at rest starts moving with constant acceleration of 0.5m/second square and travels a distance of 25m.

• We have to find its final velocity and time taken.

$\green{\underline\bold{Given :}} \\ :\implies \text{Initial\:velocity(u)=0\:m/s} \\ \\ :\implies \text{Acceleration(a)= 4\:m/s}^{2}\\ \\ :\implies \text{Time(t)= 4\:sec}\\ \\ \red{\underline \bold{To \: Find : }} \\ :\implies \text{Final\:velocity(v)=?}$

• According to given question :

$\bold{using \: first \: equation \: of \: motion} \\ : \implies v = u + at \\ \\ : \implies v = 0 + 4 \times 4\\ \\ \green{: \implies \text{v = 16 \: m/s}}$

For finding Distance travelled in this interval:

$\bold{Using \: second \: equation \: of \: motion } \\ : \implies s = ut + \frac{1}{2} {at}^{2} \\ \\ : \implies s = 0 \times 4 + \frac{1}{2} \times 4\times {4}^{2} \\ \\ : \implies s=4\times 16\\ \\ \green{ : \implies \text{s =64\:m}}$