Advertisements
Advertisements
प्रश्न
A snail covers a distance of 100 metres in 50 hours. Calculate the average speed of snail in km/h.
Advertisements
उत्तर
Distance (d) = 1000 m = 0.1 km
Time (t) = 50 hr
So, we can calculate the speed as :
`"Average Speed" = "Total distance travelled"/"Time"`
Average speed for the entire journey :
= `0.1/50`
= 0.002 km/hr
APPEARS IN
संबंधित प्रश्न
Under which condition is the magnitude of average velocity equal to average speed ?
A motorcyclist drives from place A to B with a uniform speed of 30 km h-1 and returns from place B to A with a uniform speed of 20 km h-1. Find his average speed.
If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest ?
A train starting from rest moves with a uniform acceleration of 0.2 m/s2 for 5 minutes. Calculate the speed acquired and the distance travelled in this time.
The graph given alongside shows how the speed of a car changes with time:
(i) What is the initial speed of the car ?
(ii) What is the maximum speed attained by the car ?
(iii) Which part of the graph shows zero acceleration ?
(iv) Which part of the graph shows varying retardation ?
(v) Find the distance travelled in first 8 hours.
Which of the following can sometimes be 'zero' for a moving body?
(i) average velocity
(ii) distance travelled
(iii) average speed
(iv) displacement
Give an example of motion in which the average speed is not zero but the average velocity is zero.
A train takes 2 h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200 km. Find:
The average speed,
The average velocity of the train.
A body moves from rest with uniform acceleration and travels 270 m in 3 s. Find the velocity of the body at 10 s after the start.
Write down the type of motion of a body along with the A – O – B of the following distance – time graph.
