Advertisements
Advertisements
Question
Give an example of motion in which the average speed is not zero but the average velocity is zero.
Solution
If a body starts its motion from a point and comes back to the same point after a certain time, then the displacement is zero, average velocity is also zero, but the total distance travelled is not zero, and therefore, the average speed in not zero.
APPEARS IN
RELATED QUESTIONS
In addition to speed, what else should we know to predict the position of a moving body ?
Bus X travels a distance of 360 km in 5 hours whereas bus Y travels a distance of 476 km in 7 hours. Which
bus travels faster ?
Arrange the following speed in increasing order (keeping the least speed first
A scooter moving with a speed of 30 km/h.
If a sprinter runs a distance of 100 metres in 9.83 seconds, calculate his average speed in km/h.
A car travels 100 km at a speed of 60 km/h and returns with a speed of 40 km/h. Calculate the average speed for the whole journey.
Write the formula to calculate the speed of a body moving along a circular path. Give the meaning of each symbol which occurs in it.
The speed of a moving object is determined to be 0.06 m/s. This speed is equal to :
A car accelerates at a rate of 5 m s-2. Find the increase in its velocity in 2 s.
A train is moving with a velocity of 90 km h-1 . It is brought to stop by applying the brakes which produce a retardation of 0.5 ms-2 Find :
(i) The velocity after 10 s , and
(ii) the time taken by the train to come to rest .
Define uniform velocity and give one example.
