Question

A train travels at a speed of $180\,km/h$. How far will it travel in $4$ hours?

Answer 1

Hint:The speed (often referred to as v) of an object in everyday use and in kinematics is the amount of the change in its location; it is thus a scalar number. The average speed of an object in a given time period is the item's distance travelled divided by the time period's duration; the instantaneous speed is the average speed's limit as the time period's length approaches zero.

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

Complete step by step answer:
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) or miles per hour (in the US and the UK) is the most used measure of speed in everyday use (mph). The knot is extensively used in aviation and maritime transport.

According to special relativity, the fastest possible speed at which energy or information may flow is $c$ = 299792458 metres per second in a vacuum. The speed of light is impossible to achieve since it would need an unlimited quantity of energy. The concept of rapidity has replaced the traditional concept of speed in relativistic physics.
Speed of train $v=180\,km/h$
Time taken,$t = 4\,h$
So, distance cover by train D = Speed x time
$D =180 \times 4=720\,km$
\[\therefore D{\text{ = }}720{\text{ }}km\]

Hence, the train will cover 720 Km distance in 4 hours.

Note:When examining movement in a circle, there is a significant difference. The average velocity of something moving along a circular path and returning to its starting point is zero, but the average speed is calculated by dividing the radius 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 places, whereas the average speed is determined only by the total distance travelled.