A point A of the ceiling is directly above a point B of the floor 2.5 meters below. A and B are joined by a light spring of natural length 2 meters; the tension in the spring is then 20 Newtons. A Lump of Putty of weight 4 Newtons is now attached to the spring at the point 1 meter above the...
A uniform rod of 80 Newtons is suspended from the ceiling by strings attached to its ends. The rod is in equilibrium at an angle of 10 degrees to the horizontal, and the string attached to the higher end is at an angle of 40 degrees tohe vertical. Find the angle which the other string makes with...
But this is an equilibrium problem. I understand by this that the vector triangle will be closed. Which means that the heads of two arrows will not meet. But in the diagram you have given, the two arrows' heads are meeting. Is there an error? Please suggest!
I looked up in 2 sites, "wikipedia" and "math is fun" for Cosine Law. There it is saying
c^2=a^2 + b^2 -2ab cos(theta)
Am i missing out on something? Please suggest...
A force F of magnitude 12 N, Please help!
A force F of magnitude 12 N has componenets P and Q. The sum of the magnitudes of P and Q is 18 N. The direction of Q is at right angles to F. Find the magnitude of Q.
I am not able to visualize the drawing. My question is this. I know the sum of two...
Thanks. So now we are doing this.
R^2= (Q)^2 + 2(Q)24 + (24)^2 - (24)^2 + 625
R^2= (Q + 24)^2 -576 + 625
R^2 = (Q + 24)^2 + 49
R^2 = (Q + 24)^2 + 7^2
it looks like we are almost there. But why is it (Q-24) in the required proof
and not (Q + 24) as i have got in my proof.
Am i making...
A particle is in equilibrium under the action of three horizontal forces P, Q and R. The magnitudes of P, Q and R are 25 N, Q N, and R N respectively, and the cosine of the angle between P and Q is -0.96.
Show that R^2 = (Q - 24)^2 + 7^2.
Hence find:
(a) the least possible value of R...
i did this:
R (II to slope) :
Rwcos10 = 70000sin10 ---- Rw = 12342.9 N
R (perpendicular to slope) :
Rf = 70000cos10 + 12342.9sin10 ----- Rf = 71079.9 N
I am able to get Rw and Rf on the cylinder. But I don't know how to approach mathematically expressing the second part of the question...
Part of the floor of a workshop...help!
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 link below). The magnitudes of the forces exerted...
help !force vector problem
A cricket ball has weight 1.6 N. At any instant between being struck by the bat and reaching...?
the ground the ball is subject to a resistive force of constant magnitude 0.5 N. (I have solved the following part with inverted commas but I am mentioning it case it be...