Question

If the initial velocity of a ball is - 20 m/s, and the acceleration is 4 m/s

every second, then what is the speed of the ball after 3 seconds?

Answer 1

-8 [m/s]

Step-by-step explanation:

1. the final velocity can be calculated with formula:

`V=V_0+a*t, \ where`

V - required speed, V₀ - initial velocity, a - acceleration, t - elapsed time;

2. according to the rule above:

V=-20+4*3= -8 [m/s].