Hi, need a hand with this plz if you could guide me through, cheers:
A loaded skip of total mass 2000kg is at rest on a path inclined at 21degrees to the horizontal. A force of magnitude 2500N acts upwards on the skip in a direction parallel to a line of greatest slope of the path (e.g. parallel to the slope).
i) Find the normal force exerted by the path on the skip (done this need to check answer)?
ii) Find the frictional force exerted on the skip? HELP!
iii) The force of magnitude 2500N is now removed and the skip starts to slide downwards. Given that the coefficient of friction between the skip and the path is a third (1/3), and that air resistance can be ignored, find the acceleration of the skip. Give your answer in m/s^2, correct to 2 d.p.
And this final one:
A particle P is attached to two points A and B by two light strings. P hangs in equilibrium with PA and PB making angles of 55 degrees and 25 degrees respectably with the upwards vertical, given that the tension in PA is 10N, find:
i) The tension in PB
ii) The weight of P
Cheers
Streety