Question

Please answer 6&7

al 6. You are driving home on a weekend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school? A) 180 mi B) 190 mi C) 200 mi D) 210 mi x (m) 10 Show your work clearly.Circle your final answer 6 7. (4 pts) A graph of position versus time for a certain particle moving along the axis is shown. Find the velocity at 6 seconds. 0 12 3456 -6 8. (8 pts) An object is at x 5 m at t-0 and moves along the x axis a to the velocity-time graph shown. A. What is the instantaneous acceleration at t-8 s? u, (m/s) 20 t 10 B. Find the position of the object at t -13s 0 一10-15 -10 C. Does this object ever change direction? If so, at whnt time or times? 9. (4 pts) An airplane needs to reach a forward velocity of 203.0 km/h to take off. On a 2000-m runway, what is th minimum uniform acceleration (in m/s') necessary for the plane to take flight if it starts from rest? 10. (8 pts) Mature salmon swim upstream, returning to spawn at their birthplace. During t vertically upward over waterfalls as high as 3.6 m. a. With what minimum speed must a salmon launch irself into the air to clear a 3.6 m waterfall? ihe arduous trip they lea b. How long does it take the salmon to clear the 3.6 m waterfall?

Answer 1