Transcript Chapter 18 Test Review

Chapter 18 Test Review
• What is a reference point?
• The object that stays in place in relation to a
moving object.
• What 3 factors describe motion?
• Position, direction of motion, and speed.
• What is the equation for acceleration?
• Average acceleration = Final velocity - starting velocity
time it takes to change velocity
• What is the equation for average speed?
• Average speed = total distance
total time
• What factors affect an object’s gravitational
force?
• Masses of the objects and distance of the
objects.
• How do you find the net force of an object?
• Combine all forces acting on an object.
• Compare speed and velocity.
• Velocity must have a direction. Both are the
distance an object travels divided by the time
it takes.
• What is the affect of an unbalanced force? A
balanced force?
• An unbalanced force will cause a change in
motion, speed, or direction. A balanced force
will not cause change.
• When graphing acceleration or speed: what
does an upward slope mean, what does a
downward slope mean?
• Upward slope = increase in acceleration,
Downward slope = decrease in acceleration.
• Magnetic force: The force that pushes magnets
apart or pulls them together.
• Motion: object’s change in position relative to a
reference point.
• Gravity: The force of attraction between objects
that is due to their mass.
• Friction: a force that always acts to oppose motion.
• Electric Force: The force that pushes or pulls
charged objects
• Speed: the distance traveled over time.
• Velocity: distance and direction traveled over time.
• Law of Universal Gravitation: idea that all objects
in the universe attract each other through
gravitational force.
• Acceleration: a change in a moving object’s speed
or direction.
• Force: a push or pull that always acts on an object.