Advertisements
Advertisements
Question
If a sprinter runs a distance of 100 metres in 9.83 seconds, calculate his average speed in km/h.
Advertisements
Solution
Distance (d) = 100 m
Time (t) = 9.83 s
So, we can calculate the speed as :
`"Average speed" = "Total distance travelled"/"Time"`
Average speed for the entire journey :
= `100/9.83`
= 10.173 m/s
Now , we can convert it in km/h as :
= `((10.173)(3600))/1000`
= 36.62 km/hr
APPEARS IN
RELATED QUESTIONS
What does the path of an object look like when it is in uniform motion?
Name the physical quantity obtained by dividing ‘Distance travelled’ by ‘Time taken’ to travel that distance.
A car is moving along a straight road at a steady speed. It travels 150 m in 5 seconds:
What is its average speed ?
The speed of a moving object is determined to be 0.06 m/s. This speed is equal to :
Which of the following can sometimes be 'zero' for a moving body?
(i) average velocity
(ii) distance travelled
(iii) average speed
(iv) displacement
When is a body said to be in motion?
Express the following in m s−1.
1 km h−1
A car moving on a straight path covers a distance of 1 km due east in 100 s. What is the speed of the car?
The velocity-time graph of a moving body is given below in Figure
Displacement in each part AB, BC and CD.
The velocity-time graph of a moving body is given below in Figure
The acceleration in parts AB, BC and CD.
