Velocity is equivalent to a specification of an object's speed and direction of motion. It is found using V=d/t.
Acceleration is the rate of change of the velocity of an object with respect to time. It is found using A=v/t
Free fall is any motion of a body where gravity is the only force acting upon it.
Force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity and accleration. It is found using F=ma
Newton's three laws are all used in physics. First is the law of inertia, an object in motion remains in motion or remains at rest unless there is an outside force. Second, f=ma. Lastly, every force has an equal and opposite reaction force.
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are three types of friction, static, kinetic, and rolling. Friction is found by using F of friction= coefficient of friction times the normal force.
Air resistance, also known as drag, is a force acting opposite to the relative motion of any object moving. Drag is found by using D=1/4 p A v^2.
Tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar object. The tension of a string is the same throughout the whole string though.
A block and tackle is characterized by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load. Pulleys and masses are used in many atwood machine problems as well.
Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. This path can be consistant in a circle or not. In this motion you can find the accleration, vecocity, radius from the center, and orbital period.
The force of gravity is always towards the center of the earth or planet. The law of universal gravitation is Fg= Gm1m2/r^2. Orbital period is the time it takes for the object to complete one orbit around the planet. This is determined from the radius, mass, gravity.
Energy is neither created nor destroyed but transformed between forms. We can prove this by finding different types of energy such as kinetic, thermal, etc. Energy is the capacity for work. It can exist in these different types of energy.
The coefficient of friction is a multiplier that you can multiply by the normal force to find the friction force. The number depends on how rough the surface is and how much the materials resist each other, the higher the coefficient of friction, the more their two surfaces repel one another. The coefficient of friction is represented with the symbol 𝝁.
Net force is the total force, this is the force in the direction of the movement.
The normal force is the force of the surface beneath on the object perpendicular to the surface. On a flat surface, the equation for normal force is FN=mg.
Period is the time for one full circle around. It is represented by T and is called the period.