Question

which quantity is used to measure the rate of motion? write its SI unit.​

Answer 1

The way of measuring the rate of motion of an object is refereed to Speed...

The SI unit of speed is metre per second...

Answer 2

Speed is the quantity that is used to measure the rate of motion.

In other words, distance travelled per unit time is called speed.

Speed of an object is calculated by the formula-

• $Speed = \frac{Distance Travelled}{ Time Taken}$

The Si unit of speed is m/s or Meter per second.