Friction
Name the for Frictions
Rolling, Fluid, Sliding, Static
Made of two or more simple machines
Compound Machines
Another word for when a machine transfer the work
Converts
A ball is thrown upward and eventually falls back to the ground. What force is applied when the ball falls?
Gravity
Example of two men pushing against a box at the same time
Balanced force
When an object moves across a surface but does not roll
Sliding
When an applied force causes work.
Work
Consists of a rod attached to a wheel
Wheel & Axle
A fixed, identifiable object used to show that an object is in motion.
Reference Point
One man is pushing a box at 200 N, while another many is pushing against the box at 150N. Is it unbalanced or balanced?
Unbalanced
When an object is still
Static
A tool used to make work easier
A machine
Two inclined planes joined back to back, used to split things
Wedge
Example: A tree on the side of sidewalk. Is it a good or bad reference point?
Good Reference Point
Students are pulling on both sides of a rope, but the rope stays in the same place. What force is applied in this scenario?
Balanced
A bird flying is an example of...
Fluid
Formula for Work
W= FxD (work= Force x Distance)
Has a wheel that has a pole and rope wrapped around it
Pulley
Formula for speed
Speed= distance/time
If a marble is moved 20cm by a force, how far will it travel if the force is tripled?
60cm
When a car's wheels turn to move the car...
Rolling
Name the 6 types of machines we learned.
Incline Plane, Lever, Screw, Pulley, Wheel & Axle, Wedge
Flat surface that raised so that one end is higher than another. Helps move heavy objects.
Inclined plane
The location towards which an object is moving, for example N,S,E,W etc.
Direction
When an object falls to the ground, this force opposes to fall in the air.
Interia