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

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it