1. When a rock thrown straight upwards gets to the exact top of its path, its
1) Velocity is about 10 m/s and its acceleration is zero.
2) Velocity is zero and its acceleration is zero.
3) Velocity is zero and its acceleration is about 10 meters per second per second.
4) Velocity is about 10 m/s and its acceleration is about 10 meters per second per second.
5) None of these
2. While a car travels around a circular track at a constant speed its
1) Inertia is zero.
2) Acceleration is zero.
3) Velocity is zero.
4) None of the above