1: $F_g$ (Gravitational Force/Weight) acting downwards, 2: $F_n$ (Normal Force) acting upwards.

1: $F_{app}$ (Applied Force) at an angle, 2: $F_g$ (Gravitational Force/Weight) down, 3: $F_n$ (Normal Force) up, 4: $f_s$ (Static Friction) or $f_k$ (Kinetic Friction) opposite the direction of motion.

1. Draw a Free Body Diagram (FBD). 2. Resolve forces into x and y components. 3. Apply Newton's Second Law ($\Sigma F = ma$) in each direction. 4. Solve for unknowns.

1. Find the velocity functions $v_x(t) = \frac{dx}{dt}$ and $v_y(t) = \frac{dy}{dt}$. 2. Find the acceleration functions $a_x(t) = \frac{dv_x}{dt}$ and $a_y(t) = \frac{dv_y}{dt}$. 3. Evaluate $a_x$ and $a_y$ at the specified time t. 4. Calculate the net acceleration $a = \sqrt{a_x^2 + a_y^2}$. 5. Find the net force using $F = ma$.

A body at rest will remain at rest unless an outside force acts on it, and a body in motion at a constant velocity will remain in motion in a straight line unless acted upon by a net external force.

If an unbalanced force acts on a body, that body will experience acceleration (or deceleration).

The tendency of an object to resist changes in its motion.

The vector sum of all forces acting on an object.

Friction that occurs when surfaces are not sliding relative to each other.

Friction that occurs when surfaces are sliding relative to each other.

A unit-less constant for a given surface, representing the ratio of frictional force to normal force.