Answer: 12.56 m/s
Step-by-step explanation:
The velocity of something that is doing a circular motion can be written as:
v = R*w
Where:
v is the velocity.
R is the radius, in this case, we know that it is 8m.
w is the angular velocity, we know that:
w = 2*pi*f
where:
pi = 3.14
f = frequency, this is equal to the inverse of the period, and we know that the period is 4 seconds.
then:
f = 1/4s
w = 2*3.14*(1/4s)
Then the velocity will be:
v = 8m*2*3.14*(1/4s) = 12.56 m/s
The velocity is 12.56 meters per second, and the mass of the passenger does not mater for this particular calculation.