a toy race car zooms across the ground with an acceleration of 1.8 m/s^2 after 3 seconds has a final velocity of 12.2 m/s^2, what is the toy cars initial velocity

Answer 1

To solve this problem, we can use the formula:

Final velocity (v) = Initial velocity (u) + (acceleration (a) x time (t))

Given that the acceleration is 1.8 m/s^2, the time is 3 seconds, and the final velocity is 12.2 m/s, we can plug in these values into the formula and solve for the initial velocity (u):

12.2 m/s = u + (1.8 m/s^2 x 3 s)

12.2 m/s = u + 5.4 m/s^2

Subtracting 5.4 m/s^2 from both sides of the equation gives:

12.2 m/s - 5.4 m/s^2 = u

Therefore, the initial velocity of the toy car is:

u = 6.8 m/s