Science Chapter 2 Flashcards
Force
a push or pull on an object.
Net force
all the forces are acting on an object.
Balanced forces
two or more forces acting on an object where the effects cancel each other. The forces are equal.
Unbalanced forces
When two or more forces on an object are not equal to each other. The forces do not cancel each other out
Friction
A force that acts to resist moving between 2 touching surfaces.
Balanced vs Unbalanced forces
Balanced force is where two or more forces acting on an object where the effects cancel each other; the forces are equal. It will be written as 0N (with no direction because it’s not moving). Unbalanced forces is when two or more forces on an object are not equal to each other; the forces do not cancel each other out. It will be written as: (whatever the number is)N and then the direction it is in. example of an unbalanced force: 5N west.
What are the 3 types of friction
Static, Sliding, Rolling
Static Friction
the type of friction that prevents an object from moving when a force is applied. Static friction gets greater when the surface gets rougher and the object gets heavier. Enough force needs to be applied to overcome static friction.
Sliding Friction
Slows down the sliding object. A force must be applied to move the rough areas of one surface past the rough areas of the other.
Rolling Friction
friction needed to make a wheel or tire turn. Friction between the tire or wheel and the ground.
Newton’s 1st Law
Objects in motion stay in motion until an outside force acts upon it. Objects at rest will stay at rest unless and outside force acts upon it.
Weight
the gravitational force between you and the earth
Newton’s 2nd Law:
An object acted upon by a net force will accelerate in the direction of the force.
Calculations/ Formulas
F=ma
m=f/a
a=f/m
Newton’s 3rd Law
For every action there is an equal and opposite reaction
