PhysicsClassical Physics
Velocity vs Time Graph: Sketch Acceleration over 100 s
Convert a 100-second velocity vs time graph into five acceleration intervals, including the flat segment and reversal.
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PhysicsClassical Physics
Motion in a Circle: Acceleration and Rim Speed of a Grindstone
Convert a grindstone’s rotation rate into centripetal acceleration, multiples of g, and tangential rim speed.
PhysicsClassical Physics
Inelastic Collision: Final Velocity of Two Coupled Train Cars
Use signed momentum conservation to find the common velocity of two oppositely moving train cars after a perfectly inelastic coupling collision.
PhysicsClassical Physics
Law of Conservation of Momentum: Final Velocities of Two Hockey Pucks
Find both hockey-puck velocities using the law of conservation of momentum and the elastic condition, then check momentum, energy and direction.
PhysicsClassical Physics
Impulse Momentum Theorem: Average Force When a Cruise Ship Stops
Apply the impulse momentum theorem to a stopping cruise ship, calculate the average force on the pier, and make the constant-deceleration assumption explicit.
PhysicsClassical Physics
Moment of Inertia for a Circular Disk and Annular Cylinder
Find the moment of inertia for a circular disk and a thick annular cylinder about one central axis, then convert rev/s to calculate rotational kinetic energy.
PhysicsClassical Physics
Kepler's Laws: Orbital Period of a Satellite 1500 km Above Earth
Use the Moon's orbital data and Kepler's third law to find a satellite's period, including the conversion from altitude to Earth-center distance.
PhysicsClassical Physics
Buoyant Force: Density of a Rock Weighed in Air and Water
Find displaced water mass, rock volume, and average density from 540 g in air and a 342 g apparent submerged mass; assess consistency with granite.
PhysicsClassical Physics
Gyroscopic Precession: A 40 rev/s Disk with a 15 cm Pivot Offset
Calculate precession angular speed for a 0.5 kg disk with a 10 cm radius and a 15 cm pivot-to-center distance using the corrected problem version.