Moving 2 m/s (sped up by 2 m/s)
Alice and Kai were playing air hockey, which is a game where players hit a
puck with paddles so the puck slides across a table. After the game, they were
crashing the puck and two different paddles. The puck was the same in both
crashes, but the paddles were different: the red paddle had less mass, while the
purple paddle had more mass. Use the information in the diagram to answer.
In which crash did the puck experience a stronger force? Why?
b Crash 2; the force on the purple paddle was stronger in this crash, so the force on
the puck was also stronger.
c The diagram doesn't tell you anything about the force on the puck. It only gives
information about the force on the paddles.

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative