Cyclist a is moving at 20.0 m/s whereas cyclist b is moving at 12.0 m/s in the same direction and is initially ahead ofa. when they are abreast, they both start to accelerate. twelve seconds later, b overtakes a when b's speed is 36 m/s. what is a's speed at this point?

Explanation:

The kinematic parameters from the moment the two cyclists begin to accelerate until they meet are:

Initial parameters:

:  Initial speed of cyclist A

: Initial speed of cyclist B

Final parameters:

: Final speed of cyclist B

distance of cyclist A = distance of cyclist B

time of cyclist A = time of cyclist B

Cyclist B Kinematics

Cyclist A Kinematics

the answer is a. at the equator

i believe the answer would be:

d. violin, clarinet, french horn, and tuba