Page 105 - SCIENCE DLP T6 SK (SEMAKAN 2017)

Factors Affecting Frictional Force

Frictional force is affected by several factors. Let us carry out the experiments
to test these factors.

Mass of an Object

1. Aim: ________________________________________________________
2. Problem statement: How does the mass of an object affect frictional
force?

3. Hypothesis: ____________________________________________________
4. Variables:
(a) manipulated: ______________________
(b) responding: _______________________
(c) constant: __________________________
paper clip pulley
5. Apparatus and materials: pulley, paper clip,
10 units of 50 g weight, exercise book, textbook,
thread
6. Steps:
(a) Prepare the apparatus and materials desk
as shown in picture A.
activity book weight
(b) Add a 50 g weight until the exercise book
begins to move on the desk.
picture A
(c) Record your observation in a table.
(d) Repeat steps 6(b) and 6(c) by adding a
textbook on top of the activity book as shown textbook paper clip pulley
in picture B.
7. Data: ________________________________
8. Interpreting Data:
(a) Based on the experiment, compare the
weights that are used to move the books. desk
Give your inference.
activity book
(b) What is the factor that affects frictional force?
(c) What is the operational definition of frictional weight
force? picture B

9. Conclusion:
____________________________________________________________

6.2.3,
6.2.5 97