1 a) A particle P of mass m is placed on a rough plane inclined at an angle tan-1 (5/12) to the horizontal.The coefficient of friction between the plane and P is 0.5. Prove that P will remain stationary.(adsbygoogle = window.adsbygoogle || []).push({});

1b ) A light inextensible string is fastened to P, passes up a line of greatest slope, over a frictionless pulley at the top of the plane, and to its other end is attached a particle Q of mass 2m , which hangs freely. Prove that the particles will move and find magnitude of their acceleration.

1c ) When Q has decended a distance h , it hits the floor and rebounds with 0.5 of its speed. Show that Q will hit the floor again before P comes to instantaneous rest.

I cant solve the problem of 1C ) Someone pleae help.

No diagram is included in the question orginally.

Answers for

6b) a= 5g/13 = 3.846 ms-2

6c) T(Q) = 1.387(h)^0.5 Means Root h

T(P)=0.3396(h)^0.5 = 1.074(h/g)^0.5

So t(Q) < t(P)

PLEASE HELP!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Mechanics ( one easy Questionw hich i cant solve ) A-Levels Sylabbus

**Physics Forums | Science Articles, Homework Help, Discussion**