Answer the following question:

A known mass is released from rest and slides down a frictionless curved ramp. The height of the block at two points and the horizontal distance between those points is also known. Students wish to measure the differences (magnitudes only) in speed. acceleration, momentum, and the arrival time at each point. Which of these could be calculated from the known data? \f1. speed only 2. acceleration only 3. momentum only 4. time interval only 5. speed and momentum 6. acceleration and time interval 7. speed, acceleration, and time interval 8. speed, momentum, and time interval 9. all four variables can be calculated