Advertisements
Advertisements
प्रश्न
Which is greater?
(i) 36 km/hr
(ii) 8.5 m/s
Advertisements
उत्तर
36 km/ hr can be converted into m/ s to compare with 8.5m/ s.
36 km/ hr = {36 x 1000) / 3600 = 10 m/ s which is greater than
8.5 m/ s So 36 km/ hr is greater than 8.5 m/ s.
APPEARS IN
संबंधित प्रश्न
The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.
Suppose the two photographs, shown in Figure 1 and Figure 2, had been taken at an interval of 10 seconds. If a distance of 100 metres is shown by 1 cm in these photographs, calculate the speed of the fastest car.
Figure 1 Vehicles moving in the same direction on a road
Figure 2 Position of vehicles shown in Figure 1 after some time
The relation S= v x t can easily be used to find the tota l distance covered by a body moving with non -uni form speed. (Yes/ no)
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?
Compare speed and velocity
The speed of a train is expressed in m/h.
Usain Bolt crossed 100 meters in ______ seconds and made a world record.
A spaceship travels 36,000 km in one hour. Express its speed in km/s.
