Q6(1 point)

A roller coaster starts from rest at its highest point and then descends on its frictionless track. Its speed is 26/26/ when it reaches ground level. What was its speed when its height was one quarter of that at its starting point?

A

8.6/8.6m/s

B

11.2/11.2m/s

C

17.5/17.5m/s

D

22.5/