P8-forces In Balance Flashcards
Name 6 scalar quantity’s
Speed Time Energy Distance Mass Temperature
What are scars
Physical quantity’s that have size but no specific direction
What are vectors
Physical quantity’s that have both size and direction
Name 6 vector quantities
Velocity Weight Momentum Force Acceleration Displacement
What is meant by a force
A force is a push or a pull that acts on an object due to the interaction with another object
Name 4 contact forces
Tension
Friction
Air resistance
Normal contact force
Name 3 non contact forces
Gravitational force
Electrostatic force
Magnetic force
What is weight and how do you calculate it
The force acting on it due to gravity
Weight (N) = mass (kg) x gravitational field strength (N/kg)
What is the centre of mass
It is the point where it’s mass can be thought of as being concentrated
What is the equation for forces and elasticity?
Force(N) = spring constant (N/m) x extension (m)
What is the moment of a force
It is a measure of the turning effect of the fire in an object
What are low gears used to do
To multiply the turning effect
In a high gear what happens when the turning effect decreases?
The speed of the output increases
