Given:
S = 2000 m
a = 20 m

To find v and P, we need to use the equations of motion:

v^2 = u^2 + 2as
where:
v = final velocity
u = initial velocity (assumed to be 0 m/s since it is not specified)
a = acceleration
s = displacement

Plugging in the values:
v^2 = 0 + 2 20 2000
v^2 = 0 + 40000
v^2 = 40000
v = √40000
v = 200 m/s

Next, we can find the power (P) using the formula:
P = F * v
where:
P = power
F = force (calculated using Newton's second law: F = ma)
v = velocity

Calculating the force first:
F = ma
F = 20 * 2000
F = 40000 N

Now, calculating power:
P = 40000 * 200
P = 8000000 W

Therefore, the final velocity (v) is 200 m/s, and the power (P) is 8,000,000 W.