Download - Why can’t things stay put?
Why can’t things stay put?
Motion
Core Content
SC-04-1.2.1 Students will interpret or represent data related to an
object’s straight-line motion in order to make inferences and predictions of changes in position
and/or time.SC-04-1.2.2
Students will infer causes and effects of pushes and pulls (forces) on objects based on representations or interpretations of straight-line movement/motion in
charts, graphs, and qualitative comparisons.
Pedro has three balls of different masses. He rolls each ball down a ramp hitting an empty box at the bottom of the ramp.
A. Identify which ball will push the box the farthest distance.
B. Using your science vocabulary, explain why the ball you chose in part A will push the box the farthest distance.
C. Using your science vocabulary, explain one change that Pedro can do to make the box travel further.
By the end of this unit, you will be able
to answer this question…
We will learn to…
• Measure and record changes in the position and motion of an
object• Make inferences about the effects of the size of various
forces
• relative motion• frame of reference• speed• velocity• force• friction• gravity• work• kinetic energy• potential energy Essential
Vocabulary
What is motion?
• Motion is a change in the position of an object.
• Objects can move in a straight line, circular path, or
back/forth as a vibration.
• Speed – the rate at which an object changes position
• Velocity – the speed and direction of a moving object
• Acceleration – the rate at which an object speeds up or slows down
How can we describe motion?
•Work is the ability to move something and make a change.• Energy is the source of that change.
What is the difference
between work and energy?
• Kinetic energy is the energy of motion. It is the energy you are actually using at the time.• Potential energy is energy that
is stored to be used later.
What are the 2 types of energy?
• We use a frame of reference to detect motion.
• A frame of reference lets you compare the position of 2 or more
objects.
How can motion be observed?
• Motion is caused by any force that comes in contact with an object.• A push, pull, or friction can cause a change in motion.
What causes motion?
• Gravity is a force that pulls one object toward another object.
• The force of gravity depends on the mass of each object, and the distance between them.
• A spring scale is used to measure the force of gravity (weight) of an object.
How does gravity cause
motion?
• A force can cause an object to speed up, slow down, stop, or change direction.• The amount of change is
determined by the amount of force.
How can a force change the motion of
an object?
Material Which flag did it reach when you pushed the yellow button?
Which flag did it reach when you pushed the red button?
Prediction Result Prediction ResultCarpetWoodVinylIce
Friction
What observations did you make?
Slope 1 Distance TraveledNo parachuteSmall parachuteLarge parachuteSlope 2 Distance TraveledNo parachuteSmall parachuteLarge parachute
Forces in Action
What observations did you make?