Simple Machines
What are the six simple machines?
Inclined plane, Screw, Lever, Wedge, Pulley, Wheel and Axle
Define work and the formula.
Work is when a force causes an object to move in the direction of the force; W= Force x Distance
What is friction?
A force that resists motion between two surfaces in contact.
What is motion?
What does the first law state?
Law stating that objects at rest remain at rest, and objects in motion remain in motion unless acted upon.
Fulcrum
Joules
What is gravity?
The force that objects exert on each other from their masses.
How do you calculate speed?
Distance/ Time
What does the second law state?
Law stating that acceleration of an object increases with increased force and decreases with increased mass
A screw is a type of ___
Inclined Plane
Power is the rate at which work is done; P=Work/ Time
The net force of a balanced force is __.
0
What is acceleration and how can you calculate it?
The rate at which velocity changes over time; Vf-Vi/T
What does the third law state?
Law stating that every time an object exerts a force that is equal in size and opposite in direction.
Machines never have 100% efficiency because of ___.
Friction
What is the unit for power?
Watts
What is inertia?
Tendency of an object to resist a change in its state of motion.
On a speed graph, what is on the x-axis and the y-axis?
X-Time and Y-Distance
Mass and Distance between objects.
What is the "formula" for classing levers?
FLE-Fulcrum,Load,Effort
Decreasing time will ___ power but increasing time will ___ power.
Increase; Decrease
What is centripetal force and where does it point?
Any force that keeps an object moving in a circle;Inside/Middle
On an acceleration graph, what is on the x-axis and what is on the y-axis?
X-Time and Y-Velocity
What are the four types of friction?
Static-Strongest
Sliding
Rolling
Fluid