The discussion revolves around the differences between changing the direction of velocity and changing the direction of acceleration, with examples provided to illustrate these concepts. Participants explore various scenarios, including projectile motion and vehicle acceleration and braking, as well as centripetal acceleration.
Participants generally explore the concepts without reaching a consensus on all points, as some questions remain open for further examples and clarification.
Some assumptions about the scenarios discussed may not be explicitly stated, and the examples provided may depend on specific conditions of motion.
When you throw a ball upwards, then at the top of the trajectory the direction of velocity changes, but the direction of the acceleration stays the same.Sundown444 said:Just to make sure, what is the difference between changing the direction of velocity and changing the direction of acceleration? Can anyone answer, please?
A.T. said:When you throw a ball upwards, then at the top of the trajectory the direction of velocity changes, but the direction of the acceleration stays the same.
If you go from pushing the accelerator pedal to pushing the brake pedal, the direction of the car's velocity doesn't change, but the direction of the car's acceleration changes.Sundown444 said:can you please give me another example?
A.T. said:If you go from pushing the accelerator pedal to pushing the brake pedal, the direction of the car's velocity doesn't change, but the direction of the car's acceleration changes.
YesSundown444 said:What about the case of a centripetal acceleration at constant speed? Do both the direction of the velocity and acceleration change?