Forces Flashcards
What is a force
What are the two types
A force is a push or pull that acts on a object due to its interaction with another object. (Measured in newtons
Non contact forces and contact forces
Why are forces classed as vector quantities
Because they have both magnitude and direction
Name 4 contact forces
Friction
Air resistance
Tension (pulling)
Normal contact force ‘reaction force’
Name 3 non contact forces
Gravitational
Magnetic
Electrostatic
Difference between contact and non contact force
In contact forces objects are physically touching but in non contact forces they don’t require the objects to be touching as they have a field of influence meaning the force can act on anything in that surrounding area
Non contact forces ________ as the objects get further apart
DECREASE
What 2 forces can either be attractive repulsive
Magnetic and electrostatic
What is a vector quantity
What is a scalar quantity
A vector is a quantity that has magnitude And direction
A scalar is a quantity that only has magnitude.
How can we determine the spring constant/stiffness for a spring
- Fix the top of the spring to a clamp on a retort stand. Also fix a ruler next to it, with the zero mark lined up with the bottom of the spring (a
Name 5 scalar examples
Speed, distance, temperature, time, mass
What is hookes law
F = ke
Force = spring constant × extension
What is newtons second law
F=ma
Force = mass x acceleration
(The acceleration of an object is directly proportional to the net force acting on it)
What is newtons first law
If the resultant force acting on a stationary object is 0 then the object will remain stationary.
If the resultant force acting on a moving object is 0 then the object will continue moving in that direction with the same speed and velocity.
What is inertia
The tendency of an object to remain unchnaged
What are 5 vector quantity examples
Displacement, Velocity, momentum, force, acceleration
