# Homework H1.C - Fa22

CORRECTION in problem statement:  All units for this problem should be in SI. Please use r = 0.5 m and v_P = 10 m/s.

Discussion and hints:

Using the path description, we know that there are two components of the acceleration vector:  one that is tangent to the path (the rate of change of speed), and one that is normal to the path and pointing inward toward the center of curvature (the centripetal component). The tangential component of acceleration will point:

• in the direction of motion if the speed is increasing,
• in the opposite direction of motion if the speed is decreasing, and
• will be zero if the speed is constant.

All three situations are shown in the above animation - are you able to see these?

We encourage you to interact with your colleagues here on conversations about this homework problem.

## 5 thoughts on “Homework H1.C - Fa22”

1. Noah says:

Are y'all having all three sketches on one graph? Or having 3 separate graphs for clarity.

1. Caterina Alvina Oliverio says:

I am probably going to make 3 separate graphs for clarity.

2. Drew Payne says:

Do we only need to write the cartesian vectors for the shown position, or should they be valid for any position?

1. Quqi Zhang says:

My thought is that we need to first write acceleration into et and en direction. then we use the given location, converted to cartesian coordinate. It would be just at the location P which shown in the picture

3. Jennifer Dina Short says:

Would that be for the path description, not cartesian coordinates? For cartesian coordinates, we should be using i and j right?