How Is Net Work Calculated When Pulling a Boat?

  • Thread starter Thread starter mikefitz
  • Start date Start date
  • Tags Tags
    Boat Work
AI Thread Summary
The discussion centers on calculating the net work done on a boat being pulled by two locomotives through a canal. The tension in each cable is 4.27 x 10^3 N, and the angle is 20 degrees. The user initially calculates work using the formula W = 2 * [4.27 x 10^3 * 1.04 * cos(20)], resulting in 8345 J. However, a key error is highlighted regarding the distance conversion from kilometers to meters, which needs to be addressed for accurate calculations. Proper unit conversion is essential for determining the correct net work done on the boat.
mikefitz
Messages
155
Reaction score
0
http://img517.imageshack.us/img517/6533/c6p4ty2.jpg

The drawing shows a boat being pulled by two locomotives through a canal of length 1.04 km. The tension in each cable is 4.27 x 103 N, and theta = 20.0o. what is the net work done on the boat by the two locomotives?


Here is what I've done so far:

Force=4.27*10^3
delta(r)=1.04
theta=20

W=2* [4.27*10^3 (1.04) (cos20) ]

=8345J

What am I doing wrong here? thanks
 
Last edited by a moderator:
Physics news on Phys.org
The distance is given in km--convert to meters.
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Net work done on boat by locomotives
Replies
1
Views
3K
Physics — Net work on a box being pulled…
Replies
6
Views
2K
Difficulty in deciding when to apply work energy theorem
Replies
2
Views
1K
What is the net work done on the boat by the two locomotives?
Replies
5
Views
3K
Calculating Power and Tension for Lifting a Boat on an Incline
Replies
6
Views
3K
Calculating Tension in Ropes Connecting Multiple Barges
Replies
4
Views
5K
Power/Work-Energy HW: Find Tension in Ski Boat Tow Rope
Replies
11
Views
5K
Can someone help me to design a boat inclined lift ?
Replies
1
Views
2K
Force pulling on a string at an angle with a block at the other end
Replies
2
Views
998
How Does Changing Tension and Radius Affect the Work Done on a Toy Plane?
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top