Contact Forces
What makes a contact force?
touching objects
What makes a non-contact force?
objects do not touch
The unit of force
Newton
What is it that a see-saw rests on?
Fulcrum
True or False
A Spanner is a compound machine
False
True or False
If a book is sitting on a table, is it an example of a force in action?
True
What attracts magnetic force?
opposite magnetic poles
Newtons first law is about....
Inertia
How many parts are there in a lever?
3
Most Levers are Force ___________?
Multipliers
Name 2 contact forces
friction, air resistance, tension, reaction
What type of charges attract (electrostatic force)
Opposite charges
Newtons 2nd law is about
Acceleration
What do we call the item being lifted by the lever?
Load
What do we call a machine that magnify's the force applied to a job?
Force Multiplier
If a book has levitated off a table and is just hanging there, still, it is an example of a contact force
No - its not touching anything.
Name 3 non-contact forces
Gravity, Electrostatic, Magnetic
Newtons 3rd law is about
Equal and Opposite reactions
What do we call the pushing or pulling that occurs on the handle to lift the load?
Effort
Scissors are an example of, what type of machine?
simple
Name 1 thing that will reduce friction
(one of the following) oil, lubricant, smooth surface, types of materials, etc
What is the gravitational pull measured at
9.8 m/s2
True or False.
Newton has a 4th law of motion (we just don't use it)
False
There is no 4th law of motion
What do we call the middle section of the lever that separates the load and the effort?
pivot or fulcrum
What class lever is a see-saw?
Class 1