hi here is a test on mechanics which will help u to revise ur concepts..
plss have a look at it and ans the questions..

Marking scheme
+6 for right ans and -2 for wrong ..

result and ans will be displayed here only on 30th i.e. sunday..


1. A block of mass 4kg is kept over a rough horizontal surface.The cofficient of static friction between the block and the surface is 0.1.At t=0, 3m/s,velocity is imparted to the block and simultaneously -2N foce acts on it . its displacement in first 5 second is.
a 8m                b -8m              c 3m                      d -3m

2.A body initially at rest, moves on rough horizontal circular road f radius r with a
constant tangential acceleration a.After time t body begins to slip. the correct relation for this instant is

A. a ² t² =  .  rg.     B..   rg   = a ² t² /r + a   C. rg  =underoot of a⁴ t⁴ /r+ a²

D. none


3.A particle,moving with uniform speed v ,changes its dorection by an angle  theta   in time t .magnitude of average acceleration during this time is?.

4. A small sphere of diameter 2m is placed at rest near  the front end of a stationary truck of length 12m .AT time t=0,the truck start moving with a constant acceleration of 90m/s^2 . If the coefficient of friction  between the sphere
and suface of truck is 0.1.Find velocity of sphere just before it collides
with the rear end of truck...

5. A particle of mass 0.01kg moving horizontally with velocity 20m/s strike a
   stationary wedge ABC of mass 0.05kg with a velocity of 20m/s near the  apex   of  the wedge and comes to rest after collision.The wedge is free to move.Second collision of the particle with the wedge occurs at B. find AB.(SEE FIGURE)
given theta = cot inverse of 2