PHYSICS TESTLET I

ST. MARTIN’S GIRLS SCHOOL, KIBAGARE
P.O.BOX 14960-00800
FORM IV PHYSICS ASSIGNEMENT 10TH SEPTEMBER 2009
NAME: __________________________________________________________________________

a) What is centripetal force?




b) Name the type of force producing centripetal acceleration in
i) Moon moving round the earth.


ii) Negatively charged particles moving round the nucleus of an atom


iii) The table 1below shows the results obtained from an investigation in circular motion
Table 1
Centripetal force F, (N)
0.10
0.15
0.20
0.25
0.3
Radius r, (cm)
8
12
16.5
20.5
25


a) Plot a graph of centripetal force F against radius r in meters on the grid provided.
b) Calculate the slope of the graph.








c) Given that the mass of the body in the circular path is 150g. Use the graph to determine the angular velocity.