kinematics and dynamics
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The two concepts that make up linear motion are distance and time. Distance refers to the displacement of an object in a straight line, while time measures the duration taken for the object to move from one point to another in that line.
The two types of motion according to direction are linear motion and rotational motion. Linear motion is when an object moves along a straight path, while rotational motion is when an object spins or rotates around a fixed point.
Uniform linear motion refers to an object moving in a straight line with a constant velocity. This means that the object covers equal distances in equal intervals of time. The speed and direction of the object do not change during uniform linear motion.
A train moving along a straight track and a ball rolling along a flat surface are both examples of objects moving in linear motion where they move in a straight line.
An object can move in a straight line, known as linear motion, or it can rotate around a fixed axis, known as rotational motion.
In rotational motion, linear acceleration and angular acceleration are related. Linear acceleration is the rate of change of linear velocity, while angular acceleration is the rate of change of angular velocity. The relationship between the two is that linear acceleration and angular acceleration are directly proportional to each other, meaning that an increase in angular acceleration will result in a corresponding increase in linear acceleration.