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A man pulls a suitcase with a horizontal force, F, as shown in Figure 5 - Edexcel - GCSE Physics Combined Science - Question 4 - 2016 - Paper 1
Question 4
A man pulls a suitcase with a horizontal force, F, as shown in Figure 5. Two other forces acting on the suitcase are labelled P and Q. (a) (i) Which of these gives ... show full transcript
Worked Solution & Example Answer:A man pulls a suitcase with a horizontal force, F, as shown in Figure 5 - Edexcel - GCSE Physics Combined Science - Question 4 - 2016 - Paper 1
Step 1
Which of these gives the correct names for the forces P and Q?
Answer
To accurately identify the forces P and Q, we must first understand their roles. In this case, force P represents the upward force that counteracts the weight of the suitcase, which is known as the 'reaction' force. Force Q, acting opposite to the direction of the pull, indicates the frictional force resisting the motion. Therefore:
- Force P: Reaction
- Force Q: Friction
The correct names for forces P and Q match option D: Friction (for Q) and Upthrust (for P).
Step 2
Draw a diagram to represent the situation, showing all the relevant forces acting on the suitcase.
Answer
A diagram would typically illustrate the suitcase in the center, with arrows indicating the following forces:
- A horizontal arrow pointing to the right labeled 'F' (the pulling force).
- An upward arrow labeled 'P' (the reaction force, pointing upwards).
- A downward arrow labeled 'Weight' (the gravitational force acting downwards).
- A leftward arrow labeled 'Q' (the frictional force opposing the pull). Ensure to represent these forces proportionately to show their relative magnitudes.