To accurately describe the cyclist's acceleration based on the provided graph of velocity over time, consider the following:
- Constant and non-zero acceleration: This would imply a straight line with a positive or negative slope on the velocity graph.
- Constant and zero acceleration: This would be depicted as a horizontal line where the velocity remains unchanged over time.
- Acceleration going up: This suggests that the slope of the velocity graph is increasing (the velocity is increasing at an increasing rate).
- Acceleration going down: This would imply that the slope of the velocity graph is decreasing (the velocity is increasing but at a decreasing rate, or the velocity is decreasing).
Without seeing the actual graph, I cannot definitively say which statement is correct. However, if the graph shows a linearly increasing velocity, then the acceleration is constant and non-zero. If the velocity is constant (horizontal line), the acceleration is constant and zero.
Please review the graph and see where the velocity is plotted over time to select the appropriate response based on the characteristics described above.