Speed of an Object
Speed of an Object
Speed :
Speed is the distance traveled per unit time. It is a way of measuring how quickly something is moving or being done, or something moving fast.
Calculation of speed:
The instrument/ meter measuring the speed of the vehicle is called a speedometer. The distance traveled by the vehicle is given by an instrument called odometer.
We can calculate speed from the given formula.
The SI unit of speed is meter per second(m/s). We also calculate speed as kilo meter per hour(km/h).
We can calculate the speed of an object if we know the distance it travels in a given amount of time. Let us see how this is done.
Illustration 1:, In a 100 m race Shreya ran the race in 20 s. What is Shreya’s speed?
Solution:As speed is the distance traveled in unit time, Shreya’s speed is the distance traveled in unit time. Shreya’s speed can be calculated by dividing the distance she ran by the time she took to cover that distance. Therefore, Shreya’s speed is:
Speed is a way of measuring how quickly something is moving or being done, or something moving fast.
Illustration 2: If a person covers a distance of 15 m in 5 seconds then find out the speed of the person.
Solution: As we know,
Therefore,
Illustration 3: A car is moving with a speed of 50 m/s in time 20 seconds. Find out the distance covered by the car in given time period.
Solution: We know that
Distance = 50 X 20 = 1000 m/s = 1 km/s
An athlete runs 200 meters in 24 seconds.His speed is? | |||
| Right Option : D | |||
| View Explanation | |||
A person crosses a 60 meter long street in 5 minutes.what is the speed in km/hr | |||
| Right Option : B | |||
| View Explanation | |||
A train covers a distance in 50 minutes,if it runs at a speed of 48 kmph on an average find the speed at which the train must run to reduce the time of journey to 40 minutes. | |||
| Right Option : B | |||
| View Explanation | |||
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