Question 5.3
The question is invalid and will be excluded from marking. The frictional force cannot stay 20 N when F is removed. Apologies! Total of Q5 will become 11 and the four marks will be distributed as follows:
Q3.6: The last criteria of the graph (B above/below A) becomes a package of two marks; award 2 or 0. Total of Q3.6=6
Q4.1: Three marks for the law as follows:
When a resultant/net force acts on an object, the object will accelerate in the direction of the force (tick) at an acceleration directly proportional to the force (tick) and inversely proportional to the mass of the object. (tick)
OR
The resultant/net force acting on an object is equal to the rate (tick) of change of momentum of the object (tick) in the direction of the resultant/net force (tick).
Total of Q4.1=3
Q4.4: The relationship between a and m becomes 2 or 0. Total of Q4.4=2
Q6.2.2: The name counts three marks as follows:
Identify hexane (tick)
Identify the fluoro and dimethyl (tick)
Correct numbers(positions) and sequence. (tick)
Total of Q6.2.2=3