The kinetic energy of an object of mass m moving with speed v is given by:

For the bicycle in our problem,

and

, so the kinetic energy is
I would say it’s “B” for the reason that the student did not experiment with a short ramp and large ball as well as a large ramp and a short ball. They have to do those experiments as well before drawing their conclusion.
radio waves bc they have the longest wave lenthgs in a magnetic spectrum
6489 for the founding product