Question

i ) What is the unit of speed? ii) How to measure distance travelled by the vehicle? iii) Calculate the speed of a car if the distance covered by the car 100 m in 15 sec.

Answer 1

Required Answers:-

$\pmb\diamond$ What is the unit of Speed?

S.I. unit of Speed is meter per unit and standard unit is kilometre per hr.

$\pmb\diamond$ How to measure distance travelled by a vehicle?

To find the distance travelled by a vehicle, we have to apply following formula:

$\Large\underline{\boxed{\sf Distance=Speed\times Time }}\bigstar$

$\pmb\diamond$ Calculate the speed of a car if the distance covered by the car is 100m in 15 seconds.

To find the Speed of car, we have to apply following formula:

$\large\underline{\boxed{\sf Speed=\dfrac{Distance}{Time}}}\bigstar$

Now substituting given values

$\sf\longmapsto Speed=\dfrac{100m}{15\:sec}$

$\sf\longmapsto Speed=6.66m/sec$

So the required speed of vehicle is 6.66m/s.

Additional information:-

• Speed can be defined as the distance travelled per unit time.

• Speed is a scaler quantity.

• Speed can be measured by using speedometer.