Calculate how much weight the crane could lift

AI Thread Summary
To calculate the weight a crane can lift, it's essential to consider the forces acting on the jib, including the mass and acceleration. The jib's different lengths create varying loads, particularly with a 16T counterweight on the shorter end. The mechanics of equilibrium must be analyzed to understand how these forces balance out. A sketch of the crane setup can aid in visualizing the problem and clarifying the calculations. Further assistance in mechanics is needed to resolve the confusion regarding the jib's dimensions and load distribution.
Clueless87
Messages
1
Reaction score
0
Homework Statement
Hi all, new to the forum so not sure if I’m filling this out correctly but I’m currently studying for an exam for my work and going through past papers. The question is;

The horizontal jib of a tower crane is 36m long, weights 3T and is mounted on a turntable 8m from the machinery end of the jib. The shorter end of the jib carries a 16T counter weight at its furthest extent.

i)Draw a sketch of the crane (east enough), and the loads exerted on it (not so easy…for me at least) (5 points)

ii) Calculate how much weight the crane could lift if the load were suspended at the far end of the crane’s jib and the jib is in equilibrium. (5 points)
Relevant Equations
I have no idea….
I think the first part is F = mxa? But given the jib is resting on a turntable at a certain distance, does that mean the longer and shorted ends experience different loads? Especially when the shorter end has a 16T counterweight?

The second part, I have no idea how to calculate this nor the equilibrium.

Any help would be greatly appreciated!
 
Physics news on Phys.org
Mechanics help?
Drop your car at the PF garage.
Welcome to PF!
 
Start by making a sketch and post it here!
 
Clueless87 said:
The horizontal jib of a tower crane is 36m long, weights 3T and is mounted on a turntable 8m from the machinery end of the jib. The shorter end of the jib carries a 16T counter weight at its furthest extent.
I can't make sense of that. 8<36/2, yet the other end is shorter? Should it be 28?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging 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

Lifting a 30m 35te Spud Leg: Crane Weight Calculation
Replies
8
Views
2K
Lifting a Beam with a uniform weight distribution
Replies
5
Views
5K
Finding the WORK done by a crane in lifting a load
Replies
14
Views
8K
Calculate tilt angle of a bar lifted via two ropes on fixed points
Replies
7
Views
3K
Calculating maximum load and counterweight of a tower crane
Replies
3
Views
18K
Find the mass M so that the net torque is zero
Replies
6
Views
2K
How Does Hill's Law Affect Lifting Different Weights?
Replies
1
Views
4K
How do I calculate the normal force for equilibrium lab?
Replies
20
Views
6K
Conservation of energy: Crane raising a mass
Replies
17
Views
3K
How much work is done by the crane in lifting the load?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top