A body can have multiple types of motion. A car running straight on a road is an example of motion in one dimension or motion in a straight line. A bird flying in air is an example of motion in two dimensions or motion in a plane. Two dimensions or two axes (a pair of x, y or y, z or x, z) form a plane.
Projectile motion is a two dimensional-motion in which a body moves in two dimensions or moves in a plane. Two dimensions or two axes (a pair of x, y or y, z or x, z) form a plane. For example, an airplane flying in air is an example of motion in two dimensions.
Rotational motion is a kind of motion in which the body follows a curved path. For example, the wheel of the car or train is in constant rotational motion.
Movement is a part of our day-to-day lives. But what is it that measures our movement? It’s momentum. In Physics, Momentum refers to the quantity of motion that an object has. It can be defined as “mass in motion”. Any slightest of object that has mass and moving is said to have momentum. The higher the momentum of the body, the higher force is required in the negative direction to stop it. We might have heard a person is on roll. It means, in an ironic way, if a person has gained momentum its difficult to bring him down.
Newton’s first law of motion states that a body continues to be in the state of rest or in the state of motion until and unless acted upon by some external force
IMPORTANT UNITS OF MEASUREMENTS density, electric charge, electric current, force, frequency, length, mass, measurements, power, pressure, speed, stress, temperature, time, velocity.