1. Define all of the physical quantities used in kinematics dynamics, and energy
ID: 1864960 • Letter: 1
Question
1. Define all of the physical quantities used in kinematics dynamics, and energy for translational motion. (e.g. displacement/position, velocity, acceleration, force, mass momentum, energy). Show all of the SI units for all of these. 2. Define all of the physical quantities used in kinematics dynamics, and energy for rotational motion. Show all of the Sl units for all of these. 3. Write Newton's Second Law for both translational and rotational motions. Describe all of the physical quantities involved. 4. Provide the answer to the following question: Are you rocket scientist? Explain your answer.
Explanation / Answer
Problem 1)
Displacement : Linear displacement is movement in one direction along a single axis. A displacement is a vector quantity therefore it's measurement also indicates the direction of motion. Denoted by v and SI unit is m.
Velocity : The velocity of an object is the rate of change of its position with respect to time. Velocity is a physical vector quantity; both magnitude and direction are needed to define it. SI unit is meter per second.
Acceleration : Linear acceleration is the rate of change of velocity in a linear direction (along a straight line) with respect to time. SI unit is meter per second squared.
Force : A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. SI unit is Newton.
Mass : Mass is a measure of the amount of matter in an object. Mass is usually measured in grams (g) or kilograms (kg).
Momentum : Momentum is the quantity of motion of a moving body. It is expressed mathematically as p = m * v and has units of momentum is kilogram meter per second.
Energy : Energy is the capacity of a physical system to do work. The common symbol for energy is the uppercase letter E. The standard unit is the Joule.
Problem 2)
Angular displacement : The angular displacement is defined as the angle through which an object moves on a circular path. It is the angle, in radians, between the initial and final positions. (?f - ?i) = angular displacement.
Angular velocity : Angular velocity, also called rotational velocity, is a quantitative expression of the amount of rotation that a spinning object undergoes per unit time. Itis ddenoted by symbol ? (omega). It is a vector quantity, consisting of an angular speed component and either of two defined directions or senses. SI unit is radian/sec.
Angular acceleration : Angular acceleration is the rate of change of angular velocity. In three dimensions, it is a pseudovector. In SI units, it is measured in radians per second squared (rad/s^2), and is usually denoted by the Greek letter alpha
Torque : Torque, moment, or moment of force is rotational force. Torque is denoted ny symbol ? (Tau). SI unit is Newton meter (Nm).
Angular mass : The moment of inertia, or known as the angular mass or rotational inertia, of a rigid body is a tensor that determines the torque needed for a desired angular acceleration about a rotational axis. SI unit is kilogram meter squared.
Angular momentum : Angular momentum is the rotational equivalent of linear momentum. It is the quantity of rotation of a body, which is the product of its moment of inertia and its angular velocity. SI unit is kilogram meter squared per second.
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