Tagged Questions
1
vote
2answers
62 views
Resolution of vectors
What is the fundamental basis of resolution of vector. Suppose we have a vector $\vec{mg}$, now we resolve it into two components, horizontal and vertical. My question is what is the basis for telling ...
1
vote
1answer
71 views
Hydrostatic pressure at lateral directions
I just read that, with respect to a stationary tiny cube, suspended in a fluid, that has a negligible weight and dimensions:
Pressure is the same in every direction in a fluid at a given depth, ...
-1
votes
1answer
101 views
Vector Addition — Direction
Say we have three forces $F_1, F_2, F_3$, such that
$$
F_1 + F_2 - F_3 = 0\hspace 10mm (1)
$$
And let us say that $F_1$ and $F_2$ have the same direction and magnitude, and that $F_3$ has double the ...
0
votes
1answer
113 views
A very elementary question regarding force of friction
When I first studied friction I faced f = $\mu$ N where f is force of friction, $\mu$ is coefficient of friction for the surface considered and N is the normal force for the body on surface. Now f is ...
0
votes
1answer
86 views
Component of force field tangent to a curve
I recently had to solve the following problem:
A force $F=10\hat x- 8\hat y$ is applied to an object that is constrained to travel towards increasing values of x along the path defined by $y=x^2$ ...
1
vote
1answer
61 views
How to express answers where inequalities are involved?
Part of the floor of a workshop is inclined at 10 degrees to the horizontal. This is to allow the safe storage of steel cylinders. A cylinder of mass 7000 kg is stored as shown in the diagram (c the ...
0
votes
2answers
749 views
Confused on how to properly use right hand rule
I am having trouble using the right hand rule properly and often find myself putting my hand in awkward orientations. I know you point your hand in the direction of $r$ and then point your fingers in ...
1
vote
3answers
95 views
Mechanics Problem
I'm trying to follow Feynman's lecture. Unfortunately I'm a bit stuck on a small piece, so if you could show me what I'm doing wrong then I'd greatly appreciate your help. I want to exactly know how ...
0
votes
1answer
210 views
A Lawnmower Problem
For my physics class we were just given an exam that asked the following:
A 12Kg lawnmower is pushed with a constant force along the 30* handle with 80N.
Break the Forces into its vector ...
0
votes
1answer
73 views
Finding The Obtuse Angle [closed]
I am working on a simple force problem involving inclines. I found a reference of $48^\circ$, in the third quadrant; now, to find the obtuse angle, do I subtract that value from $270^\circ$, or do I ...
-1
votes
1answer
176 views
How to properly find equilibrium vectors when 3 or 4 vectors are present? [closed]
I'm having trouble regarding how to find the equilibrium of vectors. We were given tables with given information and had to fill them in; I'm fairly sure my initial attempts were incorrect.
first ...
2
votes
1answer
286 views
Combined Gravitational Force Vectors in a Spherical Coordinate System
Asking a question here is quite intimidating for me -- while I love Physics, my high-school understanding only allows me to go so far... I've been trying to solve this problem for the last couple of ...
0
votes
2answers
340 views
Question involving Vectors and Forces
This is a question I found in Mechanics for Engineers by Beer & Johnston.
A 600-lb crate is supported by the rope and pulley arrangement as shown below.
Write a computer program which can be ...
0
votes
1answer
791 views
Vertical component of moving weight at a 45 degree angle
Here's an easier one.
I use the leg press machine at the gym so I don't have to worrying about hurting myself while lifting heavier weight.
The weight glides on a track that looks to be 45 degrees.
...
2
votes
2answers
1k views
split gravitational force into x, y, and z componenets
I am writing a program for a computer science class in which I am doing an n-body simulation in 3-dimensional space. Currently, I have figured out the gravitational force along the hypotenuse between ...
6
votes
3answers
1k views
Physics of a skateboard ollie
Does anyone have a good explanation of the physics and vectors of force involved in the skateboarding trick the ollie (where the skater jumps and causes the skateboard to rise off the ground with ...
