Motion and force Flashcards
Friction
Force opposing the motion of a surface that moves or tries to move across another surface
Newton’s first law
An object remains at rest or in uniform motion unless acted on by a resultant force
Newton’s second law for constant mass
Resultant force = mass x acceleration
Gravitational field strength
Force of gravity per unit mass on a small object
Weight
The force of gravity acting on an object
Inertia
Resistance of an object to change of its motion
Drag force
The force of fluid resistance on an object moving through the fluid
Terminal speed
The maximum speed reached by an object when the drag force on it is equal and opposite to the force causing the motion of the object
Thinking distance
The distance travelled by a vehicle in the time it takes the driver to react
Braking distance
The distance travelled by a vehicle in the time taken to stop it
Stopping distance
Thinking distance + braking distance
Mass
Measure of the inertia or resistance to change of motion of an object
