Page 20 - Physics Form 5 KSSM_Neat
P. 20
Table 1.4
State of motion Stationary on the Moves upwards with Moves upwards with
ground (engine is acceleration constant velocity
switched off)
Free body diagram
KEMENTERIAN PENDIDIKAN MALAYSIA
Acceleration, a
Resultant force, F
Comparison between
forces
SCAN ME
3. Scan the QR code and print Table 1.4. SCAN ME
Worksheet
Discussion: (Table 1.4)
Based on the example in this activity, summarise the relationship
between the resultant force and the state of motion of an object in
the form of a suitable thinking map. http://bit.ly/2SXwcqO
Solving Problems Involving Resultant Force, Mass and Acceleration of
an Object
Example 1
Figure 1.7 shows a coconut of mass 2.0 kg falling LET’S ANSWER
LET’S ANSWER
with an acceleration of 9.0 m s .
–2
(a) Sketch the free body diagram of the coconut.
(b) Calculate the resultant force acting on the coconut.
(c) State the direction of resultant force.
(d) What is the magnitude of the air resistance m = 2.0 kg http://bit.ly/
acting on the coconut? 2ZW39FA
[Gravitational acceleration, g = 9.81 m s ]
–2
Figure 1.7
Solution
Air resistance, R
(a) The forces acting on the coconut are its
weight and air resistance (Figure 1.8).
Weight, W
Figure 1.8
10 LS 1.1.3 1.1.4
