A stationary mass of 50 kg experiences a force of 30 N. What is the acceleration produced and the velocity after 4 seconds?

Answer is 20

Explanation:

As we know

\Large\boxed{ \tt{}F =ma}

F=ma

Here Given

★ F = 100

★ m = 25 kg

Putting in the equation

\leadsto\tt{100=25\times\:a}⇝100=25×a

On solving

\sf{\dashrightarrow\:a = 4 \:ms^{-2}}⇢a=4ms

−2

Now the body initially is stationary therefore initial velocity (u) must be zero

u = 0

Applying Newton 1st Law of Motion :

\sf\Large\boxed{ \tt{}v =u + at}

v=u+at

Substituting the values to find final velocity at t= 5 sec

\leadsto \tt{v = 0 + 4 \times \:5}⇝v=0+4×5

\tt{ \pink{\dashrightarrow\:v = 20 \:m/s}}⇢v=20m/s

☞ Hence, the final velocity is 20 m/s

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )