Forces

A presence that changes how things move.

Contact Forces

Commonly push or pull.

• Friction
• Tension
• Drag Force
• Normal Force

Non-Contact Forces

• Gravity
• Electromagnetism

Net Force Newton’s 2nd Law

Net force is the total force vector of where the object is headed $F_{net}=ma$ $F_{net}={\sqrt{F_x^2+F_y^2}}_{[Directio{n}^o]}$ For an object to have constant velocity, $a=0$, which means $F_{net}=0$

Free-body diagrams

These are just diagrams to help you logic out the problem