At 12:00 p.m., a woman drives at a constant velocity of 50 km/h north for 1 hour, accelerates at a uniform rate for 20 minutes until she reaches a velocity of 100 km/h north, maintains the same velocity for another 20 minutes, accelerates (constant rate) for 20 minutes to 120 km/h, maintains the same velocity for 1 hour, then slows down for one hour to 100 km/h at a constant deceleration, and finally slows to stop in one hour at a constant deceleration.
1. What is her average velocity from 12:00 to 1:00p.m?
2. What is her instantaneous velocity at 12:20 p.m?
3. What is her average acceleration from 12:00 to 1:00p.m?
4. What is her average acceleration from 1:00 to 2:00p.m?
5. What is her average acceleration from 1:30 to 4:00p.m?
6. What is her average velocity from 1:00 to 2:00 p.m?