Question

a second skater with mass 2m starts at the same initial height h as the original skater. compare the second skaters ke at the bottom of the ramp.a keb 1.4 kec 2 ked 4 ke

Explanation:

Step1: Define original skater's KE

Using conservation of energy: gravitational potential energy converts fully to kinetic energy (assuming no friction). For original skater of mass $M$:
$$KE = MgH$$

Step2: Calculate second skater's KE

For second skater of mass $2M$, same height $H$:
$$KE_2 = 2M \cdot g \cdot H$$

Step3: Relate to original KE

Substitute $KE = MgH$ into $KE_2$:
$$KE_2 = 2 \cdot KE$$

Answer:

C. 2 KE