Normal Acceleration: Value & Direction of Velocity, Angular Velocity, and Force

[helpme1]

Homework Statement

Normal acceleration characterizes the change in...

Homework Equations

a. value of velocity b. direction of velocity. c. value of angular velocity d. direction of angular velocity e. value of force

The Attempt at a Solution

which one is true ?
thanks in advance.

 

[srmeier]

What do you think normal acceleration is? And what is the definition of acceleration in general?

 

[helpme1]

n physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, acceleration is the rate at which something speeds up or slows down. However, as a vector quantity, acceleration is also the rate at which direction changes. Acceleration has the dimensions L T^-2. In SI units, acceleration is measured in metres per second squared (m/s2).

 

[srmeier]

n physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, acceleration is the rate at which something speeds up or slows down. However, as a vector quantity, acceleration is also the rate at which direction changes. Acceleration has the dimensions L T^-2. In SI units, acceleration is measured in metres per second squared (m/s2).

yes i like it, now:

say we have an acceleration vector in two dimensional space, is the normal acceleration component characterizing the change in the velocities' magnitude or the velocities' direction?

 

[helpme1]

direction of velocity. right?

 

[srmeier]

direction of velocity. right?

you are a pro!

 

[helpme1]

wow, it's right. :) thanks for your valuable response. but be ready, the newswaves will not stop! ;)lol