Part (a):  This was a popular question among the candidates and performance was average.  However, few candidates could not draw good graphs using their values.

Part (b):  The (i) was well attempted while in (ii) virtually all the candidates left out the key word falling under its own weight alone in the explanation.

Candidates are expected to:

1. Measure and record five values of h to at least 1 d.p. in cm.
2. Determine and record five values of time t to at least 1 d.p. in seconds and in trend.
3. Correctly evaluate and record to at least 2 d.p.
4. Correctly evaluate and record five values of T2 to at least 2 d.p.
5. Correctly evaluate five values of L = h – 30
6. Show composite table containing h, L, t, T and T2

-           Plot a graph using reasonable scales
-           draw line of best fit
-           determine the slope of the graph and the intercept c
-           evaluate k1 = k1 =  4π2/s and k2 =
-           state any two of the following precautions

               e.g  -    Avoided conical oscillations 
                      -    Ensured firm suspension of pendulum
                      -    Ensured reading is repeated (shown on the table)
                      -    Avoided draught
                      -    Corrected/noted for zero error of metre rule/ stop match/clock
                      -    Avoided parallax error in reading metre rule/ stop clock
        
       (b)  (i)   The period of oscillation of a body is the time taken for the body to make one
                    complete to and from movement                                                                              

             (ii)   When a body is falling under its weight (alone), the rate of increase of its
                    velocity with time (as a result of the earth’s gravitational pull) is the acceleration
                    of free fall due to gravity.