P3 – SCIENTIFIC INVESTIGATION.

a) INFERENCE Time for one oscillation is influenced by the length of the rope.B is influenced by A.

b) HYPHOTHESIS When the length of the rope increases, the time for one oscillation is increases.When A is increases, B will increase.

c) i) AIM OF EXPERIMENT

To study the relationship between the length of pendulum and the time for one oscillation.To study the relationship between A and B.

ii) LIST OF VARIABLES

Manipulated variable : Length of pendulum/ lResponding variable : Time for 20 oscillation/ tFixed variable : Mass of the bob.

iii) LIST OF APPARATUS AND MATERIALS.

Brass bob, thread, retort stand, meter rule, stopwatch.

iv) ARRANGEMENT OF THE APPARATUS

Draw a labeled diagram

v) PROCEDURE OF THE EXPERIMENT

- Set up the apparatus as shown above.- Start the experiment with length of the pendulum l

= 10cm- Swing the pendulum and record the time for 20

complete oscillations. Find the time for one oscillation.- Repeat the experiment with l = 20cm, 30cm, 40cm,

50cm.

vi) TABULATING DATA length, l/cm Time 1 oscillation/s

1020304050

vi) ANALYSE DATA Plot a time for one oscillation against length of pendulum graph