Question

MEDAL + FAN FOR RIGHT ANSWER!!! NEED HELP FAST

A ball with a mass of 5 kg is acted upon by force of 20 N. If the ball begins moving from a velocity of 0 m/s and accelerate for 2 seconds, what is its change in velocity?

A. 0 m/s
B. 2 m/s
C. 4 m/s
D. 8 m/s

Answer 1

F\[F=m \cdot a\\ \implies a= \frac Fm\]

Answer 2

\[a= {20 \over 5} = 4\ m /s^2\]

Answer 3

\[a= {\Delta v \over \Delta t}\]

Answer 4

\[\Delta v = a \times \Delta t= 4 \times 2 = 8 m/s\]