Question

A boy riding a bicycle covers a distance of 10 m in 40 s. What is the speed of the boy ?

Answer 1

Distance is a numerical representation of the distance between two objects or locations. Distance can refer to a physical length or an estimate based on other factors in physics or daily use (e.g. "two counties over"). The distance between two points A and B is sometimes written as |AB|. In most instances, "distance from A to B" and "distance from B to A" are equivalent.

Formula used
${\text{Speed = }}\dfrac{{{\text{Distance}}}}{{{\text{Time}}}}$

Complete step-by-step solution:
The magnitude of the rate of change of an item's position with time or the magnitude of change of its position per unit of time is the speed of an object in everyday use and kinematics; it is therefore a scalar number. The average speed of an object in a given time interval is the item's distance travelled divided by the period's duration; the instantaneous speed is the average speed's limit as the interval's duration approaches zero. The parameters of speed are distance divided by time. The metre per second (m/s) is the SI unit of speed, while the kilometre per hour (km/h) is the most commonly used unit in everyday life.
Now’
The formula of speed:−
${\text{Speed = }}\dfrac{{{\text{Distance}}}}{{{\text{Time}}}}$
Given distance=10m
Time=40s
${\text{Speed = }}\dfrac{{{\text{Distance}}}}{{{\text{Time}}}} = \dfrac{{10}}{{40}}$
$Speed = 0.25m{s^{ - 1}}$
Hence,
0.25m/s is the speed of the boy.

Note: There are various units available for speed. When examining movement in a circle, there is a significant difference. The average velocity of something moving on a circular path and returning to its starting point is zero, but the average speed is calculated by dividing the diameter of the circle by the time it takes to complete the circle. This is because the average velocity is determined only by the distance between the beginning and ending sites, whereas the average speed is determined solely by the total distance travelled.