H=20m g=9.8m/c2 v-? t-?

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вопрос

To solve for the velocity (v) and time (t), we can use the kinematic equation for free fall motion:

h = (1/2)gt^2

Since h = 20m and g = 9.8m/s^2, we can plug in the values and solve for t:

20 = (1/2)(9.8)(t^2)
40 = 9.8t^2
t^2 = 40 / 9.8
t ≈ √4.08

t ≈ 2.02 seconds

Now that we have calculated the time, we can find the velocity using the equation:

v = gt

v = 9.8 * 2.02
v ≈ 19.8 m/s

Therefore, the velocity (v) is approximately 19.8 m/s and the time (t) is approximately 2.02 seconds.