speed defnition ? What is velocity and speed
Answers
Answer:
speed is the distance covered per second
speed = distance travelled / time taken
velocity = displacement / time
Answer:
1. Speed and velocity are the physical quantities in physics.
2. These quantities are derived quantities.
Explanation:
Speed:
1. The quantity needed by an object object to travel a particular distance in a limited time, is called as speed.
2. Speed = Distance / Time
3. The SI unit of speed is 'm / s'.
4. The CGS unit of speed is 'cm / s'.
Velocity:
1. The quantity needed by an object to displace (displacement) from one place to another in limited time is called velocity of the object.
2. Velocity = Displacement / Time
3. The SI unit of velocity is 'm / s'.
4. The CGS unit of velocity is 'cm / s'.
Concepts:
1. Physics :
The branch of science which deals with the study of physical things and the surroundings is called 'Physics'.
2. Physical quantities :
The quantities which are studied in physics are called as 'Physical Quantities'.
3. Derived quantities :
The quantities which are formed with the help of two or more fundamental quantities are called 'Derived Quantities'.
4. Distance :
The actual length between any two objects is called as 'Distance'.
5. Displacement :
1. The minimum distance between any two objects is called as 'Displacement'.
2. We can say that, in language of Maths, distance is the length between any two points.
3. While, displacement is the perpendicular distance between any two points.
6. Units :
1. Any physical quantity is derived / calculated with the help of numerical value and its unit.
2. There are four systems of units.
3. They are CGS ( Centimeter, Gram, Second), MKS (Metre, Kilogram, Second), FPS (Foot, Pound, Second), SI (International System of Units).
4. All over the world, SI system is used for the easiness of calculation of physical quantities.