Question

a ball is moving with a velocity of 0.5m/s .its velocity decreasing at the rate of 0.05m/s^2. what will be its velocity after 5sec​

Answer 1

u = 0.5 m/s

a = - 0.05 m/s²

t = 5 s

v = u + at

→ v = 0.5 - 0.05(5)

→ v = 0.5 - 0.25

→ v = 0.25 m/s

Answer 2

Given:

Initial velocity (u) = 0.5 m/s

Rate of decrease in velocity/Retardation = -0.05 m/s²

Time (t) = 5 s

To Find:

Final velocity (v)

Answer:

$\sf From \: 1^{st} \: equation \: of \: motion \: we \: have:$

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

By substituting values in the equation we get:

$\rm \implies v = 0.5 + ( - 0.05) \times 5 \\ \\ \rm \implies v = 0.5 + (-0.25) \\ \\ \rm \implies v = 0.5 - 0.25 \\ \\ \rm \implies v = 0.25 \ ms^{-1}$

$\therefore$ $\boxed{\mathfrak{Final \ velocity = 0.25 \ m/s}}$