Forces
A push, a pull or a twist is a
FORCE
Two objects rubbing together causes
Friction
Ramps, screws, zips and wedges are all examples of
inclined planes
First class
When forces act on an object in opposite directions and are the same size they are known as...
Balanced forces
Something that reduces friction is
Lubricants
What is the formula to measure mechanical advantage?
Mechanical Advantage = (Length of slope)/(Height of slope)
When the effort arm is short and the resistance arm is long, this is a...
speed multiplier
Friction, air resistance, drag and tension are all examples of
Alloys, or mixtures of iron, nickel or cobalt are all examples of
Permanent magnets
levers the resistance arm is longer than the effort arm, and the mechanical advantage is less than 1.
Speed multipliers
When the fulcrum is on the end, the load is in the middle and the effort is being pulled upwards. This class of lever is
Second class
North pole to the south pole
is the force that pulls particles in a liquid together.
Surface Tension
the effort arm is longer than the resistance arm, and the mechanical advantage is greater than 1.
Force multiplier
A fishing line is an example of what class lever?
Third class
Inertia
As an objects speed increases, its air resistance also increases. This means the air resistance of a falling object increases as it falls. This is...
Terminal Velocity
Calculate the mechanical advantage of a slope that is 10m in height but has an incline slope of 25m.
0.4
If the mechanical advantage is higher than 1, the lever is a
force multiplier