Calculate the avg speed phyics help

  • Thread starter Thread starter deaninator
  • Start date Start date
  • Tags Tags
    Phyics Speed
AI Thread Summary
To calculate the average speed of the caiman, the total distance of 530 meters is divided by the total time taken. The caiman swims 190 meters at 6 m/s, taking 31.67 seconds, and then swims 340 meters at 4 m/s, taking 85 seconds. Adding these times results in a total of 116.67 seconds. The average speed is then calculated as 530 meters divided by 116.67 seconds, which yields approximately 4.54 m/s. The calculation was confirmed to be correct by participants in the discussion.
deaninator
Messages
64
Reaction score
0
"Calculate the avg speed" phyics help

Homework Statement



A caiman swims 190 meters at a speed of 6 m/s. It then enters a stream and slows to 4 m/s for 340 meters. What is the average speed of the crocodile?
10 minutes ago - 4 days left to answer.


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org


deaninator said:

Homework Statement



A caiman swims 190 meters at a speed of 6 m/s. It then enters a stream and slows to 4 m/s for 340 meters. What is the average speed of the crocodile?
10 minutes ago - 4 days left to answer.


Homework Equations





The Attempt at a Solution


You have two distance and speed sets from which you can get times. Add the times and add the distances, now you have a new r = D/t.
 


AC130Nav said:
You have two distance and speed sets from which you can get times. Add the times and add the distances, now you have a new r = D/t.

I did that. I added 190m and 340m and I got 530m as the total distance. I did the v=d/t formula on both distances and i got the times as 85 s and 31.66 s. I then divided 530m.116.66 s and i got 4.54 m/s but that is incorrect.
 


deaninator said:
I did that. I added 190m and 340m and I got 530m as the total distance. I did the v=d/t formula on both distances and i got the times as 85 s and 31.66 s. I then divided 530m.116.66 s and i got 4.54 m/s but that is incorrect.

Your numbers appear correct.
 


Thanks, you were right all along!
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
Average Speed Question for a Train that Accelerates and then Decelerates
Replies
20
Views
2K
How Long for a Beam of Light to Reach Earth?
Replies
21
Views
1K
Calculate average speed/acceleration for the given function
Replies
1
Views
2K
Need help - Average Speed-Interval Problem
Replies
1
Views
3K
Calculate the avg speed for the ENTIRE trip.
Replies
9
Views
2K
How Do You Calculate Average Speed in a River with a Current?
Replies
22
Views
6K
How does relativity affect the detection of atmospheric muons?
Replies
11
Views
2K
Motion Problem Constant Acceleration from 10 to 50 m/s in 2 secs
Replies
11
Views
1K
Distance between a person and a thunderstorm
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top