Concept — Gravitational force acting on a mass near the surface.
Present in chapters
02·08
Linked atoms
67 linked atoms.
00 Grandezze fisiche, stime, equilibrio
- Worked example — Archimedes on a human in air
- Worked example — Block hanging from two ropes
- Worked example — The gorilla pulls a crate
- Worked example — The column of air pressing on our feet
- Worked example — Ladder against a smooth wall
- Worked example — System with two masses and a pulley
- Worked example — Beam with two loads suspended from two ropes
- Worked example — A piece of wood in water with petrol
- Problem — Iron cube in water
- Problem — Hammer and feather in a vacuum
- Problem — Picture hung on two wires
- Types of forces
02 Forze e leggi di Newton
- Circling a system
- How to draw an interaction diagram
- Example — person on a platform
- Action-at-a-distance forces and contact forces
- Forces that admit potential energy
- Double gravity
- Mass: inertial or gravitational?
- Problem — Scale in a lift
- Problem — Spring with two hanging masses
- Problem — True or false on forces and motion
- True or false on Newton’s laws
03 Piano inclinato e moto circolare
- Acceleration on an inclined plane with friction
- Banking angle of the curve
- Coefficient of friction from the slipping threshold
- Two masses on a triangular plane
- Worked example — Inclined plane with kinetic friction
- Fantasy physics: zero gravity on a curve
- Fantasy physics: horizontal gravity
- Forces on the plane as the angle varies
- The bucket of water in the loop-the-loop
- The Atwood machine
- The Atwood pulley: force on the axle
- The accelerating matchbox
- The skater on the half-pipe
- Mass on a smooth plane
- Spring on an inclined plane
- Conical pendulum
- Inclined plane with pulley and hanging mass
- Smooth inclined plane
- Smooth plane at 30 degrees
- Ranking smooth inclined planes
- Choice of axes
- Skier at terminal velocity
- Estimate of the centripetal force on a passenger
- Speed of a conical pendulum
- Minimum speed in the loop-the-loop
- True or false on circular motion and inclined planes
04b Oscillazioni e moto armonico
08 Gravitazione universale
- Weightlessness on the ISS
- ISS astronaut and weightlessness
- Fall to the centre of the Earth
- Fantasy physics: G doubled
- Force between two 100 kg spheres
- Gravity at different altitudes on Everest
- Gravity on the Moon and the weight of an astronaut
- Surface gravity on the Moon
- Surface gravity on the Moon
- ISS and weightlessness (free fall)
- The hollow Moon
- Reading the graph: g(r) inside and outside the Earth
- Weight and mass
- Radius of a planet
- Ranking the surface gravity of three planets
- s²
- Problem — True or false on gravitation