Advertisements
Advertisements
Question
Arrange the following speeds in the increasing order:
(i) A bicycle moving with a speed of 36 km/h.
(ii) A car moving with a speed of 2 km/min.
(iii) An athlete running with a speed of 7 m/s.
Solution
We convert all the speeds in m/s to compare them.
36 km/hr = (36 X 1000)/3600 = 10m/s.
2 km/min = (2 X 1000)/60 = 33.3 m/s.
7 m/s = 7 m/s.
So increasing order of speed is 7m/s < 10m/s <33m/s.
APPEARS IN
RELATED QUESTIONS
A quantity is measured to be -30 m/s. Is it speed or velocity?
During circular motion, which physical quantity of the body:
Remains constant
The average time taken by a normal person to react to an emergency is one fifteenth of a second and is called the 'reaction time'. If a bus is moving with a velocity of 60 km/h and its driver sees a child running across the road, how much distance would the bus had moved before he could press the brakes? The reaction time of the people increases when they are intoxicated. How much distance had the bus moved if the reaction time of the driver were 1/2 s under the influence of alcohol?
For a body moving along a circular path, show that:
Linear speed = Angular velocity X radius of the circle
The correct relation among the following is
Asher says all objects having uniform speed need not have uniform velocity. Give reason.
Speed is a ______ quantity whereas velocity is a ______ quantity.
What is the unit of average speed in SI system?
Usain Bolt crossed 100 meters in ______ seconds and made a world record.
A car increases its speed from 20 km/h to 50km/h in 10 seconds. Its acceleration is ______.
