Final answer:
The subject matter is physics, focusing on problems that require knowledge of kinematics, energy conservation, and momentum conservation to solve questions about motion and collisions in mechanical systems.
Step-by-step explanation:
The questions posed are physics problems dealing with kinematics, energy conservation, and momentum conservation in the context of mechanical systems. These problems typically involve calculations based on fundamental principles such as the conservation of mechanical energy and the conservation of linear momentum.
Maximum velocity of a skier at the bottom of a slope calculated using potential energy and kinetic energy conversion.
- Calculating the original height of a swinging pendulum bob's arc using its velocity and conservation of energy.
- Predicting and calculating how the center-of-mass velocity of a system changes after an inelastic collision.
- Using the conservation of momentum and kinetic energy principles to determine the velocities of objects after elastic collisions.