Lesson 1 : Forces Flashcards
What are forces?
a push or pull exerted on an object
Forces have different ____________ and ______________.
strengths and directions
Forces are measured in __________.
Newtons
How can we tell if a force is acting on an object?
By observing if an object’s shape or motion changed
What do unbalanced cause objects to do?
To move in the direction of force
What is speed?
the rate at which a distance is traveled
What is velocity?
the speed of an object in a particular direction
What is acceleration?
the rate at which velocity changes over time
If the direction of an object is positive, what would be the opposite direction of the object?
Negative
What do force diagrams represent?
the forces acting on an object with arrows
What is a contact force?
acts between objects that are touching
What is a noncontact force?
acts at a distance
What are examples of a contact force?
air resistance and friction
What are examples of noncontact force?
gravity and magnetic
What is a net force?
the sum of all the forces acting on the object
