Define the terms speed, velocity, acceleration, displacement, instantaneous speed, write units also?
Answers
Answer:
Speed can be thought of as the rate at which an object covers distance. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour.
Acceleration
In physics or physical science, acceleration (symbol: a) is defined as the rate of change (or derivative with respect to time) of velocity.
It is thus a vector quantity with dimension length/time².
In SI units, acceleration is measured in meters/second² using an accelerometer.
Displacement (symbolized d or s ), also called length or distance, is a one-dimensional quantity representing the separation between two defined points. The standard unit of displacement in the International System of Units ( SI ) is the meter (m).
Explanation:
Rest two defination are in attachment
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Answer:
- Speed: Distance travelled by the object in unit time. The SI unit of speed is metre per second. This is represented by the symbol m s–1 or m/s. Speed is a scalar quantity; it only has direction.
- Velocity: Velocity is the speed of an object moving in a definite direction. The SI unit of velocity is also metre per second. Velocity is a vector quantity; it has both magnitude and direction.
- Acceleration: Acceleration is the rate of change of the velocity of an object with respect to time. Acceleration is vector quantitie ( that is it has magnitude and direction).S.I. unit is m/s2
- Displacement: When a body moves from one position to another, the shortest distance between the initial position and final position of the body, along with direction, is known as its displacement. S.I .unit of displacement is metre ( m).
- Instantaneous speed : The instantaneous speed is the speed of an object at a particular moment in time. Its S.I.unit is metre per second ( m/s).