By Sir Solehin

Scheme Answer

1(a) Inference: The time taken for Ramli and Chiam to swing from one end to the other is the same.

(b) Hypothesis: The period of a pendulum is independent of the mass of pendulum.

(c) (i) Aim: To investigate the variation in the period of a simple pendulum with the mass of the pendulum bob.

(ii) Manipulated variable: mass of pendulum bob

Responding variable: period of pendulum

Constant variable: length of pendulum

(iii) Apparatus: string, two pieces of wood, five pendulum bobs of known different masses, ruler, stop watch, retort stand and clamp

Materials: nil

(iv) The apparatus is arranged as shown in diagram

(vi) Procedure:

1. Using one pendulum bob, the simplest pendulum is set up as shown

2. The length of the pendulum, l, is fixed at 50.0 cm

3. The pendulum is displaced a little to one side and released

4. The time, t10 for 10 complete oscillations of the pendulum is determined using a stop watch.

5. Step 4 is repeated.

6. From 4 and 5, the average value for the time for 10 complete oscillations is calculated.

7. The period, T is determined by dividing the average value of t10 by 10, T=t 1010

8. Steps 1 to 7 are repeated for each of the other four pendulum bobs.

----------[students sketch simple pendulum here]------------

(vi) Tabulation of data:

Mass of pendulum bob/g

Time for 10 oscillations. t/s Period, T/stmean/10t1 t2 tmean

m1 - - -m2 - - -m3 - - -m4 - - -m5 - - -

(vii) Analysis of data

It is seen that the period is the same for all the pendulums regardless of the mass of the bob if the length is the same

By Sir Solehin