P1: Forces and Motion KEYWORDS Flashcards
Increase speed
Acceleration
Force caused by an object colliding with air particles
Air resistance
We say the forces acting on an object are this when it isn’t moving or travelling at a constant speed
Balanced
The mass of an object per volume
Density
A word to describe the amount a spring stretches by
Extension
Force caused by two surfaces moving against each other
Friction
Force which gives weight to objects of mass
Gravity
“The extension of a spring is directly proportional to the applied force, providing the elastic limit is not exceeded”
Hooke’s Law
Unit of force.
Newton (N)
Distance / Time
Speed
How fast something moves in a particular direction.
Velocity
Amount of space an object occupies
Volume
Upward force exerted on objects placed in water
Upthrust
Type of substance which reduces the amount of friction between two surfaces
Lubricant
Type of force, such as friction and upthrust, which relies on objects touching each other
Contact