Determine minimum value of weigh to cause motion, Mechanical Engineering

Determine minimum value of weigh to cause motion:

Determine minimum value of weight W required to cause motion of block, which rests on a horizontal plane. The block weighs 300N and coefficient of friction between block and plane is 0.6. Angle of warp over pulley is 90º and coefficient of friction between pulley and rope is 0.3.

 

726_Determine minimum value of weigh to cause motion.png

Sol: As the weight W impend vertical motion in down ward direction, the tension in two sides of the pulley will be as shown in figure given below

Given date:

T1  = W, µ = 0.3, θ = 90° = p/2 rad

Using relation of Ratio of belt tension, T1/T2  = eµ.θ

            684_Determine minimum value of weigh to cause motion1.png                                                                                                                                          ...(i)

Considering equilibrium of block:

ΣV = 0

R = 300N                                                                                                                             ...(ii)

ΣH = 0

T2  = µR = 0.3 × 300 = 180N                                                                                        ...(iii)

By equating the equation (i) and (iii), we get

W  = 1.6 × 180

W = 288N                                                                      .......ANS

Posted Date: 10/18/2012 8:29:46 AM | Location : United States







Related Discussions:- Determine minimum value of weigh to cause motion, Assignment Help, Ask Question on Determine minimum value of weigh to cause motion, Get Answer, Expert's Help, Determine minimum value of weigh to cause motion Discussions

Write discussion on Determine minimum value of weigh to cause motion
Your posts are moderated
Related Questions
Discover the fixing torques set up at the ends of the shaft: A solid shaft 6.5 m long is securely fixed at each of the end. A torque of 91 Nm is applied to the shaft at a sect

The de-oiled water from De-Oiling Unit enters the HLS vessel for softening. The primary function of HLS is to remove the Ca and Mg hardness and bring the total hardness to less tha

please help me to calculate the diameter of a brake drum for using in a "brake drum dynamometer engine test rig" the engine specs are as follows: - 6Hp single cylinder 4stroke engi

Determine the maximum bending moment: A 12 m span simply supported beam is carrying a consistently distributed load of 2 kN/m over a length of 6 m from the left end and point


What is fluid mechanics? what are cohesive and adhesive forces?

Cam This is a mechanical member that imparts motion to another member called follower. Illustration: A cam is rotating at regular speed of 1200 rpm in the clockwise d

An experiment to determine the convection coefficient associated with airflow over the surface of a thick stainless steel casting involves insertion of thermocouples in the casting

Example of free body diagram: The thr e e spheres A , B , C are placed in groove shown in the figure given below. The diameter of each sphere is 100mm. Sketch the free

Q. Explain the protocol for stress testing? The protocol for stress testing should be structured to include the following: 1) Continuous ECG monitoring. 2) Hard copy ECG