FORCE AND MOTION
You can tell that an object has moved when its __________ has changed. position
The object used for comparing another object to describe its position is called a… frame of reference
The distance an object moves in a certain amount of time is called _________. speed
A ______ graph can be used to show the change in an object’s speed over time. line
What makes objects change speed or direction? FORCES
What unit is used to measure forces? NEWTONS Not that kind!! YUM!!
What is a force between surfaces that slows or stops objects? FRICTION
Friction creates ______. heat
When an object is in motion it tends to stay ...
When an object is still it tends to remain ...
This is called… INERTIA
The use of a force to move an object is ________. work
The ability to do work is called _________. energy
The energy of motion is __________ energy. kinetic
The energy of position is _____________ energy. potential
Name the frame of reference in each of the following statements.
The dog is beside the house.
The duck is swimming in the pond.
Name the type of energy in each of the following statements.
The ball is rolling down the hill. KINETIC
The roller coaster is sitting at the top of the track. POTENTIAL
The pencil fell off the edge of the desk. KINETIC
The skier is at the top of the ski jump. POTENTIAL