Page 44 - Physics Form 5 KSSM_Neat

SCAN ME
Self-Reflection
Self-Reflection SCAN ME
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Self-Reflection
1. New things I have learnt in the chapter on ‘Force and
Motion II’ are ✎ . http://bit.ly/2ZV2R1U

2. The most interesting thing I have learnt in this chapter is
KEMENTERIAN PENDIDIKAN MALAYSIA
✎ .
3. The things I still do not fully understand are ✎ .

4. My performance in this chapter.
Poor 1 2 3 4 5 Very good

5. I need to ✎ to improve my performance in this chapter.

Summative Practice http://bit.ly/2FukrQI

1. Figure 1 shows the top view of a worker, X who is Worker Y Q
applying a pulling force of 70 N on a sack of flour
on a track. Another worker, Y is able to apply a Track
pulling force of 60 N on the sack. Determine the
direction of the pulling force that must be applied Rope
by worker Y on the sack so that the sack moves
along the line PQ. 40° Rope Worker X
[Ignore the friction between the sack and the surface P 70 N
of the track] Sack of flour
Figure 1
2. Figure 2 shows the top view of a pulling force applied by
two persons, P and Q in an attempt to pull down a tree.
(a) By using the method of parallelogram of forces, Tree
determine the magnitude and direction of the
resultant force on the tree.
Q
(b) Discuss the advantage and disadvantage of 160 N 140°
having a large angle between the directions of
the two forces. 280 N P
(c) Which person has to be more careful when the Figure 2
tree begins to topple?

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