What Does Constant Acceleration Mean in Mechanics?

[Natasha1]

Just wanted to clarify here:

Sometime in mechanics exercises it is mentioned that the speed should be considered as constant, which in return means that the acceleration a = 0 ms-2.

Now if it is mentioned that the acceleration should be considered as constant what does that mean? That the speed remains constant too?

Please explain simply thanks :-)

 

[VietDao29]

Just wanted to clarify here:

Sometime in mechanics exercises it is mentioned that the speed should be considered as constant, which in return means that the acceleration a = 0 ms-2.

Now if it is mentioned that the acceleration should be considered as constant what does that mean? That the speed remains constant too?

Please explain simply thanks :-)

A falling apple undergoes a constant acceleration (i.e g), does that means the apple is falling at a constant speed?
I think you should go over your textbook again, for a constant acceleration, we have:
v = v₀ + at, where:
v₀ is the initial velocity, a is the acceleration, and t is the time spent.
:)

 

[arildno]

Oops!
If the SPEED is constant, it means that the acceleration is orthogonal to the velocity at all times; you can perfectly well have non-zero acceleration in this case.