A body travels 30 m with speed 10 m s and 40 m with speed 15 m s . Calculate average speed for entire journey.
pls give me full answer
Answers
t1=30/10=3 seconds
t2= 40/15= 2.7 seconds
average speed= total distance/Total time taken
= 70/5.7= 12.28
or
you can use the formula
2v1v2÷v1+v2
2×10×15÷10+15
300÷25=12 is the right answer
this formula came from
let distance be x
and you know the speeds
t1=x/v1
t2=x/v2
average speed = x+x/x/v1+x/v2
2x/x(v1+v2/v1v2)
2v1v2/v1+v2 as x got cancelled
Answer:
- 12.34 m/s
Explanation:
As per the information provided in the question, We have :
- A body travels 30 m with speed 10 m/s and 40 m with speed 15 m/s.
We are asked to find average speed of entire journey.
In order to find the avg. speed, we will need find total distance travelled are total time taken.
Total distance :
Performing addition in RHS.
∴ The total distance traveled is 70 m.
Total time taken :
Time is given by –
Putting the given values,
∴ Total time taken is 5.67 m/s.
Average speed :
Putting the value we have,
∴ Hence, Average speed of the body is 12.34 m/s.