How Do You Calculate Average Speed If You're Given Distance and Time in Minutes?

Click For Summary
To calculate average speed, the formula is average speed equals distance traveled divided by time taken. For a car that travels 30 km in 30 minutes, the average speed can be calculated as 30 km divided by 0.5 hours, resulting in 60 km/hour. To convert minutes to hours, divide the number of minutes by 60; for example, 14 minutes is 14/60 of an hour. The discussion emphasizes the importance of unit conversion for accurate speed calculations. Understanding these conversions is crucial for applying the average speed formula correctly.
Cheesus128
Messages
22
Reaction score
0
Hey,
This is kinda a thick question but never mind.
A car travels 30KM and that for 30mins.
What is the average speed of the car?Formula is Average speed= Distance Travelled DIVIDED BY Time taken.

But its not 30 DIVIDED by 30 is it?
Is it 30 DIVIDED by 0.5 as 30mins is half of an hour?
And how exactly do you work out say 14mins of 1hour?
(I have the Circle with 3 commas [o,,,] on my calculator, forgot what its called sorry but I don't quiet get how it works.)
Thank you!
 
Physics news on Phys.org
Cheesus128 said:
But its not 30 DIVIDED by 30 is it?
That depends on the units you wanted. 30 km/30 minutes = 1 km/min
Is it 30 DIVIDED by 0.5 as 30mins is half of an hour?
That's fine. That will give you km/hour as your units of speed.
And how exactly do you work out say 14mins of 1hour?
How many minutes in an hour? Set up a fraction.
 
Your average speed is DeltaX/Deltat if you want your speed in km/hour you can convert your units using dimensional analysis. (km/min) * (60min/hour)
 
Thanks Doc. Understood that.
And thanks Melgibson for the answer even though I am sorry to say I understood nothing of what you said. But still thank you for the effort.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

Replies
1
Views
2K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 10 ·
Replies
10
Views
5K
Replies
2
Views
3K
Replies
45
Views
5K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
9
Views
2K