Position and Motion
Define position or speed (choose one).
Motion - location of an object: where an object is
Speed - how fast an object moves
What is a force? (2 things)
Force is a push or pull.
What is WORK (define)?
when an object changes motion
How do machines help people?
they make work easier
see saw
lever
What is distance (define)?
amount of space between two objects
What are the special words for magnets push and pull?
attract/repel
If I push a wall is it work? Why or why not?
NO! The wall does not MOVE so there is no work being done.
What is a simple machine (define not example)?
It is a machine with few or NO moving parts
axe
wedge
Tell me the position of 2 things in the room using position words.
ANSWERS VARY use - over, under, next to, on, left of, right of, etc.
If I push a paperclip away with a magnet, is that a contact force? Why or why not?
No, it is not touching the paperclip.
What is energy (define)?
The ability to do work
How many inclined planes are in a wedge?
2 (think of an axe)
ramp for a wheelchair
inclined plane
Name 3 of the 4 ways something can move?
zig zag, straight line, round and round, back and forth
What force holds you to the ground? Is it a contact force?
gravity, no because gravity doesn't touch you
If I kick a ball, is potential or kinetic energy used?
kinetic, energy of motion
What is a complex machine?
one ore more simple machines put together
ferris wheel
wheel and axle
If I travel 300 kilometers in 3 hours, how fast am I going?
100 km/h
Does a smooth surface, like glass, increase or decrease friction?
It decreases friction because it is easier for an object to slide on a smooth surface.
Where do people get energy from? Where do cars get energy from?
food! gasoline or fuel, or batteries for electric cars
What two simple machines made a pair of scissors?
lever and wedge
elevator
pulley