Physics Quicksheets - Kinematics

Finding Resultant Using Component Method

* Resolve vectors into x & y components

* Sum all the vectors in the x direction to get the resultant for the x direction, and do the same for the y components

• * The magnitude of the resultant
• 

the change in position that goes in a straight-line path from the initial position to the final; it is independent of the path taken.

(SI unit: m)

Vertical component of velocity = vsinθ

Horizontal component of velocity = vcosθ

Static Friction is the force that must be overcome to set an object in motion. It has the formula:

0 ≤ f_s ≤ μ_sN

Kinetic Friction opposes the motion of objects moving relative to each other. It has the formula:

f_k = μ_kN

First condition of equilibrium: An object is in translational equilibrium when the sum of forces pushing it one direction is counterbalanced by the sum of forces acting in the opposite direction. 

It can be expressed as  .