Recent content by aps0324

Is this assumption correct? (force vectors and moment) Three forces are applied to a body. They are : F1 = (4,5) applied at (1,2) F2 = (2,-1) applied at (3,-1) F3 = (-3, 2) applied at (-2,1) i) Find the resultant force Answer : R = (3,6) ii) Find the total moment about the...

Three forces are applied to a body. They are : F1 = (4,5) applied at (1,2) F2 = (2,-1) applied at (3,-1) F3 = (-3, 2) applied at (-2,1) i) Find the resultant force Answer : R = (3,6) ii) Find the total moment about the origin (This i know how to do) iii) The line of...

I did think of that..but shouldn't friction still be taken into account? Because I did the following : 1/2 x m x v^2 = mgh h = v^2 (2g) = 4.05 where v = 9 m/s and g = 10 and then in order to find the hypotenuse i used Hypotenuse = 4.05 / sin(50) But this gives me 5.28 m and the answer is...

A particle P of mass 3 kg is projected up the line of greatest slope of a plane inclined at an angle of 50° to the horizontal. The coefficient of friction between P and the plane is 0.5. The intiial speed of P is 9 m/s. ii) Find the frictional force acting on P ii) What distance moved up...

A particle of mass M slides on a horizontal surface with coefficient of (dynamic) friction μ = 0.4. At time t = 0 it is 1m from a vertical wall, moving at 6 m/s perpendicularly towards it. When does it strike the wall? ( You may assume it is less than 1 second) Homework Equations friction = μ...

Please help me with the following: What is the field strength needed to achieve a current density of 5 x10^4 [Am^-2] in a conductor of resistivity 5 x 10^-8 [Ω m] The answer I got was 2.5 x 10^-3 N C^-1 using the equation J = σ E But then I was wondering when a situation like this occurs and...

How do I find the change in potential energy though? Wouldnt I also need to know work and internal energy in order to find Q? I do not understand...could you be kind enough ( or anybody else) to explain more?

1. Assume that a car who has a mass of 1000kg (including driver) is initially rolling freely (without using the engine) down a 30° slope at a speed of 5m/s. The brakes are used causing the car to stop after 10 m. Find the HEAT CAPACITY of the brakes if they rise in temperature by 10 K...