GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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distance / time
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time / distance
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distance * time
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None of the above
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Detailed explanation-1: -The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time is in seconds (s), so the units will be in metres per second (m/s).
Detailed explanation-2: -The formula for time is given as [Time = Distance ÷ Speed]. To calculate the speed, the time formula will be molded as [Speed = Distance Travelled ÷ Time].
Detailed explanation-3: -The important thing is that speed is always the ratio of a distance traveled to the time needed to travel that distance: distance/time.
Detailed explanation-4: -A boy walks at a speed of 4 kmph. How much time does he take to walk a distance of 20 km? Time = Distance / speed = 20/4 = 5 hours. Example 2.
Detailed explanation-5: -Units of Speed Time and Distance Time can be generally expressed in terms of seconds(s), minutes (min) and hours (hr). Whereas the distance is generally expressed in meters (m), kilometres (km), centimetres, miles, feet, etc. Speed is commonly expressed in m/s, km/hr.