7. Distinguish between speed & velocity.
8. Define acceleration. Write its SI unit.
Answers
Answer:
1. distinguish between speed and velocity:
Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.
2. 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.
Answer:
don't know differentiation of speed and velocity
an capacity to gain speed
SI unit is m/s^2
symbol is "a"