Advertisements
Advertisements
Question
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 ?
Advertisements
Solution
(d) We have:
Distance (d) = 240 m
Speed (v) = 30 m/s
We can find the time as :
`"Time" = "Distance travelled"/"Speed"`
So ,
t = `240/30` s
= 8 s
APPEARS IN
RELATED QUESTIONS
Under what condition(s) is the magnitude of average velocity of an object equal to its average speed?
What does the odometer of an automobile measure?
Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Joseph’s average speeds and velocities in jogging?
- from A to B and
- from A to C?
Name the physical quantity obtained by dividing ‘Distance travelled’ by ‘Time taken’ to travel that distance.
State whether speed is a scalar or a vector quantity. Give reason for your choice.
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.
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 speed of a car is 72 km h-1. Express it in m s-1.
Give two examples of uniform circular motion from your daily life.
