# An Object Accelerating on a Ramp| University Physics

### Which direction best approximates the direction of acceleration when the object is at position 1?

ANSWER: downward to the right

At this point, the object’s velocity vector is not changing direction; rather, it is increasing in magnitude. Therefore, the object’s acceleration is nearly parallel to its velocity.

### Which direction best approximates the direction of acceleration when the object is at position 2?

At this point, the speed has a local maximum; thus the magnitude of $\vec{v}$ is not changing. Therefore, no component of the acceleration vector is parallel to the velocity vector. However, since the direction of $\vec{v}$  is changing there is an acceleration.
At this point, the speed has a local minimum; thus the magnitude of $\vec{v}$ is not changing. Therefore, no component of the acceleration vector is parallel to the velocity vector. However, since the direction of $\vec{v}$ is changing there is an acceleration.