physics chapter 4 dynamics

1st newton’s law of motion

newton’s first law of motion is that the object will continue in its state of rest or motion unless a resultant force acts on it

Resultant force (net force)

forces are balanced —> resultant force is zero

Balanced vs unbalanced forces

Balanced vs unbalanced forces

Example

unbalanced forces and newton’s second law

Newton’s second law of motion

F=ma

Newton’s third law

newton’s third law of motion states that for every action, there is an equal and opposite reaction

Free body diagrams

Effects of resistive forces on motion , friction

Example

positive and negative effects of friction

Reducing negative effects of friction

Reducing negative effects of friction

Enhancing positive effects of friction