Hint: Health is defined as an individual’s mental, physical, and psychological well-being. The disease is defined as the abnormal dysfunctioning of the mental-physical states, which results in illness in a specific individual and does not take into account society or community.
What is the name of class 9 Physics Chapter 1?
NCERT Class 9th Physics ( Science ) Chapter 1 – Motion Solutions ( Exercise 9.1 )
What is physics for 9th class?
Physics is the study of energy and matter in space and time. It deals with how the fundamental constituents of the universe interact. Content for Class 9 Physics covers the concepts of Motion, Force and Laws of Motion, Gravitation, Work and Energy and Sound.
What is motion question and answer?
Motion is a change in position of an object over time. Motion is described in terms of displacement, distance, velocity, acceleration, time and speed.
What is force class 9 very short answer?
NCERT Solutions for Class 9 Science Chapter 9 Very Short Answer Type Questions. Question 1. Define force. Answer: It is a push or pull on an object that produces acceleration in the body on which it acts.
Why do we fall ill?
Answer: This is because the immune system of our body is normally fighting off microbes. Our body have cells that are specialised in killing infecting microbes. Whenever any microbes or foreign body enters our system, these cells become active and kill the microbes that could cause any damage to the body.
What are the types of motion?
According to the nature of the movement, motion is classified into three types as follows: Linear Motion. Rotary Motion. Oscillatory Motion.
Why we do study physics?
The main reason to study physics is because you are curious about how the world works. In addition to that knowledge, you gain a set of incredibly useful skills that make you attractive to a wide range of employers. A physics degree trains you to become an expert problem solver.
What is K in physics class 9?
The letter k is generally used to denote a constant value. Some of the most commonly used constants denoted by k are: Boltzmann constant, which has a value of 1 . 38 × 10 – 23 m 2 kg · s – 2 K – 1 .
What is law inertia?
1. Newton’s First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
Is speed can be zero?
The average speed cannot be zero unless the body is stationary over a given interval of time. Average speed is the ratio of the total distance travelled by a body to the total time interval taken to cover that particular distance. However, an average velocity can be zero.
What is the formula of displacement?
Displacement = Final position – initial position = change in position.
What are motions 4 examples?
The free movement of a body with respect to time is known as motion. For example- the fan, the dust falling from the carpet, the water that flows from the tap, a ball rolling around, a moving car etc. Even the universe is in continual motion.
What is SI unit of force?
The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg.
What are the 2 types of force?
Basically, there are two types of forces: Non-contact forces. Contact forces.
What is the SI unit of velocity?
The SI unit of velocity is metres per second (m/s).
What is vaccination Class 9?
Vaccination is the injection of a dead or weakened organism that forms immunity against that organism in the body. Immunization is the process by which an animal or a person stays protected from diseases.
What does disease look like?
Note: Disease can be viewed by examining symptoms of disease. The common symptoms of diseases include headache, fever, vomiting etc. Like jaundice can be examined by pale skin. Diarrhoea can be examined by loose motions.
What is regular motion?
Related Content. A term used in Illinois circuit court civil litigation referring to any nonemergency motion that requires a hearing, such as motions directed to pleadings, summary judgment motions, and discovery motions.
What is rest physics?
Rest: An object is said to be at rest if it does not change its position with respect to its surroundings with time. Motion: An object is said to be in motion if the position changes with respect to it surrounding and time.
What is rest give example?
The examples of rest include: sleeping, sitting, standing, staring, lying, a fixed clock, bottle kept on a table, a stopped car.
Is physics easy or hard?
Students and researchers alike have long understood that physics is challenging. But only now have scientists managed to prove it. It turns out that one of the most common goals in physics—finding an equation that describes how a system changes over time—is defined as “hard” by computer theory.
Why is physics so hard?
Why is Physics harder than Math? Answer: Physics demands problem-solving skills that can be developed only with practice. It also involves theoretical concepts, mathematical calculations and laboratory experiments that adds to the challenging concepts.
How can I enjoy physics?
Instead of memorizing formulas, it is better to understand the derivations. Mugging up a number of formulas will only make you more apprehensive of the subject. Rather, if you try and understand where they come from, you will start enjoying physics and its applications!
What is energy formula?
Energy is defined as the capacity to do work. Formula. The energy stored in an object due to its position and height is known as potential energy and is given by the formula: P.E. = mgh.