Key Terms
A push or a pull
What is a force?
This is needed to change the object's state of motion.
What is a force?
Recognize a problem
What is an observation?
Lucy Lightweight stands on two scales. One foot on each scale. Each scale reads 300 Newtons. What is her weight? Assume there is no difference is distance between the two scales
What is 600 Newtons?
Two forces, Gravitational and Normal force/Support Force, act on a book on a table.
How many significant forces act on your physics book when it is at rest on a table?
The combination of all forces acting on an object?
What is net force?
In order for an object to be a rest on a horizontal surface this must be equal the object's weight
Support force
Educated Guess without an experiment
What is a hypothesis?
Mass is material and weight is a force.
What is the difference between weight and mass?
Zero
Hint: Think of the sum of all forces.
What is the net force on an object at rest?
This represents a magnitude and direction.
What is a vector or vector quantity?
The ________ in a horizontal clothesline is much greater than the ___________ in a vertical clothesline?
What is tension.
Used to test a hypothesis.
What is an experiment
The support force (normal force) that acts on the book will not cause the book to rise off the table.
What is an example of mechanical equilibrium?
20 N of ___________is in a vertical rope that holds a 20 Newton bag of apples
How much tension is in a vertical rope that holds a 20 Newton bag of apples?
Opposite force of a gravitational force
What is a normal or Support Force.
Tension force acts against this.
What is a gravitational force?
__________ is not fixed.
What is a theory?
A stage that weighs 300 N. supports two painters, one weight is 250 N and the other is 300N. The tension in the left rope is 400 N. The is tension of the right rope is _______________.
Is the tension of the right rope 450 N?
Objects are said to be in ____________ equilibrium if the object is at rest.
What is static equilibrium?
Speed is an example of this quantity.
What is an example of a scalar quantity?
m-kg/s^2
What is a Newton as a unit of measurement?
This has predictive power
What is a rule?
Or what is a law?
Harry Heavyweight, weighs 900N, stands on a pair of bathroom scales so that one scale reads twice as much as the other.Those two readings are ___________
Are those two weights 300N and 600 N?
Moving at a constant Speed in a straight line path are said to be in _________________ equilibrium.
What is dynamic equilibrium?