A non-contact force is a force that has
no contact with anything.
A contact force is a force that has contact
with something else. Some examples would
be: Pushing or pulling something and air
resistance
Air resistance is a contact force because if something
was gliding through the air, it would be in contact
with the air particles, meaning it is in contact wityh
something
Non-contact forces: Magnetism, static
electricity, and gravity
Contact forces: Pushing or pulling
something and air resistance
Different forces
Scalar - Something that only has size
Vector - Something that has size as well as direcion
Vector and
Scalar
Newtons 1st law - Every object will remain
at rest or in a uniform motion in a straight
line unless an external force chenges its
state.
Newton's 2nd law (simplified) - If an object with a
bigger mass pushes an object with a much smaller
mass, the object with the smaller mass will have more
acceleration.
Newton's 3rd law - For every action in nature
there is an equal and opposite force.
Newton's laws
Distance is how far you have gone
Displacement is how far you are from
a certain point, it can be positive or
negative
how to measure displacement:
(10 will be an example)
a² = b² + c²
10² + 10² = 200
a = √200
=14.1km
Distance
and Velocity
Force = Mass x acceleration
Inertial mass = Force ÷ Acceleration
The bigger the mass of something,
the less the acceleration will be
The bigger the force, the
greater the acceleration will be
Weight = Mass x Gravity
Work Done = Force x Distance
Speed = Distance ÷ Time
Force of a spring = Spring Constant x extension
Acceleration = (Final Velocity - Initial Velocity) ÷ Time