M2 June 2002 quest. 7

r1sh1_165

can anyone help me with this?

wot bout the mark scheme or soloutions, who's got them?

cheers!

Reply 1

geekypoo

Write out the question so most of us who don't have the mark scheme can work through it for you?

Reply 2

r1sh1_165

a straight log AB has weight W and length 2a. a cable is attached to one end B of teh log. the cable lifts the end B off the graound. the end A remains in contact with the graound, which is rough and horizontal. the log is in equlinrium. the log makes and angle@ to the horizontal, where tan@=3/4. the cable makes an angle (beta) to the horizontal. the coefficient of friction between the log and the ground is 0.6. the log is modelled as a uniform rod and the cable as light.

a) show that the normal reaction on the log at A is 2/5W. (6)

b) Find the value of beta (6)

the tension in the cable is kW

c) find the value of k (2)