Question

A pitching machine is programmed to pitch baseballs horizontally at a speed of 79 mph. The machine is mounted on a truck and aimed backward. As the truck drives away from you at a speed of 55 mph, the machine shoots a ball toward you. For each of the object pairings listed below, determine the correct relative speed.

Answer 1

To find the relative speed of the baseball with respect to the observer, you subtract the truck's speed from the pitching speed, resulting in 24 mph. The other physics problems mentioned require specific calculations related to their individual concepts.

Step-by-step explanation:

The student's question pertains to the relative speed between objects in different reference frames. Specifically, they need to determine the relative speed between a pitching machine mounted on a truck, the truck itself, and a baseball pitched towards an observer.

When the truck moves away from an observer at 55 mph and the pitching machine pitches a baseball at 79 mph towards the observer, the relative speed of the baseball with respect to the observer is the difference in speeds, because the directions are opposite.

Therefore, the relative speed is 79 mph - 55 mph = 24 mph. However, this example isn't directly related to the physics problems provided, which cover various concepts like projectile motion, impulse, magnetic fields, and rotational motion. The different physics problems require separate analyses involving equations of motion, energy conservation, and electromagnetic forces.