# 20 Physics Tutorials

These Physics tutorials are written by experienced educators, all of whom also offer private tutoring lessons. Get the Physics help you need, whether through these tutorials or through private tutoring lessons.

## Circular Motion Posted by: Evan W on Nov 12, 2017

Circular Motion deals with the forces exerted on and by an object travelling in a circle. To understand this topic, it is crucial to know several things: (1) Newton’s Second Law: F=ma where F is the variable for Force in Newtons (N), m is the variable for mass in kilograms (kg), and a is the…

## Conservation of energy Posted by: Gerry D on Oct 19, 2017

When a system is isolated from the dissipative force, then the total energy of the system remains constant with time. One of the example of it is friction force. Its direction always oppose the motion of the system and at certain amount of time, the system energy will be reduced because of work done by…

## Conservative Forces and Conservation of Energy (Proof) Posted by: Jaime V on Sep 08, 2017

In this short section we will a) define conservative forces and b) prove that such forces conserve a quantity we call energy for constant mass systems. A conservative force is defined as:

(1) Where is a function of the coordinates.Now we multiply both sides by \$\vec{v} =…

## Kinematic Relationships for AP Physics C Posted by: Chris J on Sep 05, 2017

The relationship between position, velocity, and acceleration are an integral part of understanding how to approach kinematics problems for AP Physics C. These relationships can help you read and understand a graph, and they can help you solve for variables when given an equation for one of these quantities.

## Projectile Motion Properties Posted by: Chris J on Sep 04, 2017

Projectile motion is one of the keys concepts in physics and can be defined as 2-dimensional kinematic motion in which an object is launched at a certain angle giving the object motion in both the x and y directions. These problems are important to physics because they encapsulate concepts from kinematics and a key concept…

## Choosing the Appropriate Kinematics Equation Posted by: Drew A on Sep 01, 2017

In the study of motion in physics, there are five kinematics equations that can be used to solve problems involving constant acceleration. They are: V = Vo + at d = 1/2*(Vo + V)*t d = Vo*t + 1/2*at^2 d = V*t – 1/2*at^2 V^2 = Vo^2 + 2ad Notice that each equation contains exactly…

## Mechanics Made Easy: Dimensional Analysis Posted by: Duncan F on Aug 20, 2017

In physics, a situation or formula can be evaluated by its dimensions (i.e. Length[L], Time[T], Mass[M], etc). Dimensional analysis, as it is called, checks to see if the dimensions of a formula are balanced on each side. This method of evaluation can be useful because it ensures both sides of an equation have matching units.…

## Mechanics Made Easy: Newton’s Laws of Motion Posted by: Duncan F on Aug 20, 2017

Newton’s First Law of Motion reads “An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.” This is where we get the idea of inertia: an object’s tendency to keep on its current course…

## Energy Loss Incurred when Charging a Capacitor in a RC Circuit Posted by: Jonathan P on Aug 12, 2017

Among their many applications, capacitors are often used as short-term energy storage elements in electronic systems. When a capacitor charges in a simple series RC (resistor-capacitor) circuit, the energy stored in the capacitor increases as it charges and the resistor dissipates energy as the capacitor charging current passes through it. Series resistance is present in…

## Kinematics – Projectile Motion Posted by: Allison B on Jul 23, 2017

In this problem, we will work on projectile motion. It is important in these types of problems to look at the given quantities and find the appropriate kinematic equation(s) to relate those to the quantity you are looking for. A diagram can help with this.

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