Kinematics
What is Kinematics?
The study of moving objects and motion
What is a force?
A force is a push or pull and is measured in Newtons (N)
What is momentum?
Momentum is the vector quantity that describes an object's size and its velocity.
What is energy?
Energy is the ability to do work or change one's environment.
What is rotational motion?
Rotational motion is any object spinning, in place around an axis inside its body or any object revolving around an axis outside its body
What are the two types of motions in kinematics?
Constant motion and accelerated motion
Why are forces vectors?
Forces are vectors because they have size and direction
What is the law of momentum?
The law of momentum is called the conservation of momentum law which states that a closed system must have a constant amount of momentum.
What types of energy are there?
Kinetic and Potential. Kinetic is the energy of motion and Potential is the energy due to position or stored.
What is rotational speed measured in?
Radians/second
What is constant motion?
Constant motion is motion that doesn't change. This type of motion represent constant velocity- constant speed in a straight line
What are Newton's 3 laws?
1-Inertia
2- F=ma
3- F12= -F21, equal but opposite force pairs
What are the two types of collision in which momentum is transferred?
Inelastic and elastic are the two types of momentum collisions. Ealstic is the collision in which the two objects bounce off of each other and Inelastic is the collision in which the two object stick together and travel as one after the collision
What is the law of energy?
The conservation of energy law. This law states that any closed system must have a constant amount of energy. Energy can transform from one type to another but the total energy will remain the same.
What is rotational acceleration measured in?
Radian/second squared
What is accelerated motion?
Accelerated motion is motion that is represented by changing velocity-that is changing speed and/or changing direction
What is gravity?
Gravity the force of attraction between the Earth and any other mass usually called weight.
In which type of collision is momentum conserved, elastic or inelastic?
Both
When is energy not conserved?
When a system is not closed and energy can enter or leave.
What is Newton's 2nd Law in rotational terms?
Torque (net) = I (moment of inertia) times Alpha (rotational acceleration)
How far would a car travel if it started at 10 m/s for 5 seconds and then accelerated for 5 seconds at 4 m/s2?
145 m
What is friction?
Friction is the force that opposes the motion of two (or more) surfaces moving against one another.
In which type of collision, elastic or inelastic is energy conserved?
Elastic collisions only
What is the work-energy theorem?
The work-energy theorem states that the amount of work done on a system will always equalt the kinetic energy gained by that system. Or, the amount of work done by a system will always equal the kinetic energy lost by the system.
What is the law of rotation?
The law of conservation of angular momentum states that a closed system will have a constant angular momentum.