Advertisements
Advertisements
प्रश्न
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is velocity of the car?
Advertisements
उत्तर
Distance = 1 km = 1000 m
Time = 100 s
Speed = `("distance")/("time")`
= `(1000)/(100)`
= 10 m/s
Velocity of car = Speed with direction = 10 m/s due east
APPEARS IN
संबंधित प्रश्न
Name the physical quantity obtained by dividing ‘Distance travelled’ by ‘Time taken’ to travel that distance.
Arrange the following speed in increasing order (keeping the least speed first):
A bicycle moving with a speed of 200 m/min.
A snail covers a distance of 100 metres in 50 hours. Calculate the average speed of snail in km/h.
If a sprinter runs a distance of 100 metres in 9.83 seconds, calculate his average speed in km/h.
The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey ?
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
How long does it take to travel 240 m ?
A car is moving on a straight road with uniform acceleration. The speed of the car varies with time as follows :
Time (s) : 0 2 4 6 8 10
Speed (m/s) : 4 8 12 16 20 24
Draw the speed-time graph by choosing a convenient scale. From this graph :
(1) Calculate the acceleration of the car.
(2) Calculate the distance travelled by the car in 10 seconds.
The speed of a car is 72 km h-1. Express it in m s-1.
A car is moving in a straight line with speed 18 km h-1. It is stopped in 5 s by applying the brakes. Find:
- the speed of car in m s-1
- the retardation and
- the speed of car after 2 s of applying the brakes.
A motorcyclist drives from A to B with a uniform speed of 30 km h–1 and returns back with a speed of 20 km h–1. Find its average speed.
