Choose the correct answer:
1. Four students were asked to represent the same motion on paper.
Student A drew a horizontal position–time graph.
Student B drew a straight sloping position–time graph.
Student C drew a velocity–time graph with an upward slope.
Student D drew a velocity–time graph parallel to the time axis.
Only one student has represented an object that is not changing its position.
Who is correct?
Student A drew a horizontal position–time graph.
Student B drew a straight sloping position–time graph.
Student C drew a velocity–time graph with an upward slope.
Student D drew a velocity–time graph parallel to the time axis.
Only one student has represented an object that is not changing its position.
Who is correct?
2. A student records the position of a moving object every second. Another student records only the object's speed at one exact moment.
Which statement best explains why the two observations cannot always be compared directly?
Which statement best explains why the two observations cannot always be compared directly?