A dense metal ball moves straight down through air, passing four equally spaced levels J, K, L and M. The duration of the fall from each level to the next is recorded. At which point is the ball’s speed greatest, and which interval has the least time?
- Aspeed is greatest between J and K; time is shortest between J and K
- Bspeed is greatest between J and K; time is shortest between L and M
- Cspeed is greatest between L and M; time is shortest between J and K
- Dspeed is greatest between L and M; time is shortest between L and M