If an object of mass m is at rest, the following statement is TRUE:
A) The net force on the object is zero - NSC Technical Sciences - Question 1 - 2022 - Paper 1
Question 1
If an object of mass m is at rest, the following statement is TRUE:
A) The net force on the object is zero.
B) The only force acting on the object is the normal.
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Worked Solution & Example Answer:If an object of mass m is at rest, the following statement is TRUE:
A) The net force on the object is zero - NSC Technical Sciences - Question 1 - 2022 - Paper 1
Step 1
The net force on the object is zero.
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Answer
For an object at rest, the forces acting on it must be balanced. This means that the net force is zero, confirming that option A is correct.
Step 2
The only force acting on the object is the normal.
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Answer
This statement is incorrect because, while the normal force acts on the object, gravitational force (weight) also acts on it. Therefore, option B is not true.
Step 3
The applied force is greater than the frictional force.
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Answer
Since the object is at rest, this statement cannot be true. If an applied force were greater than the frictional force, the object would begin to move. Thus, option C is incorrect.
Step 4
The only force acting on the object is the weight.
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Answer
This option is misleading; although weight is a force acting on the object, the normal force also acts upward to balance it. Thus, option D is not true.
