Projectile Motion Long Jump Question

Click For Summary
Ms. Bongiorno's long jump involves a horizontal distance of 7.59 meters and an airtime of 0.72 seconds. To find her jumping speed, the horizontal distance is divided by the time, yielding a speed of approximately 10.54 m/s. The angle of the jump can be determined using projectile motion equations, factoring in the horizontal and vertical components of the jump. Participants in the discussion are encouraged to verify calculations and provide feedback on the approach taken. The focus remains on ensuring the accuracy of the solution for the physics problem presented.
cvc121
Messages
61
Reaction score
1

Homework Statement


Ms. Bongiorno is competing in the Olympics in the long jump. She jumps 7.59m horizontally and is in the air for 0.72s.
a) With what speed did she jump?
b) At what angle did she jump?

Homework Equations

The Attempt at a Solution


My attempt at the solution is shown below. Can anyone verify my work and see if I am on the right track? Thanks. All help is very much appreciated!
 

Attachments

  • 20151114_141406[1].jpg
    20151114_141406[1].jpg
    22.4 KB · Views: 720
Physics news on Phys.org
I agree with your answers.
 
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
19
Views
3K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
1K
Replies
15
Views
3K
  • · Replies 15 ·
Replies
15
Views
2K