AP Physics Problem: Solving Homework Equations

Click For Summary
The discussion revolves around solving specific AP Physics homework problems, particularly questions 1c and 1e. The user has provided relevant equations for work and kinetic energy, specifically W = Fd and KE = 1/2mv^2. They calculated power for question 1c as P = 485 W using the formula P = 42.875 * 60 J / 5.3s. However, they express uncertainty about how to approach question 1e. Assistance is requested due to the difficulty in reading the provided image.
master_333
Messages
25
Reaction score
0

Homework Statement


1 c and e from the jpeg image.

Homework Equations


W = Fd
KE = 1/2mv^2

The Attempt at a Solution


P = 42.875 * 60 J / 5.3s
P= 485 W

and I don't know how to start 1e.

Could you please help me.
 

Attachments

  • IMG_20160116_154151.jpg
    IMG_20160116_154151.jpg
    35.5 KB · Views: 427
Physics news on Phys.org
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
2
Views
1K
Replies
1
Views
2K
Replies
12
Views
2K
  • · Replies 17 ·
Replies
17
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
22
Views
5K
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K