(01.04 MC)A helicopter is traveling 80 mph west. It is moving above a car traveling on a highway at 60 mph. Which of the following statements is true?

(01.10 MC)Jibari walks 40.0 meters east in 120.0 seconds. He then walks 30.0 meters west in 60.0 seconds. What is his average velocity for the trip?

(01.10 MC)Erin walks 50.0 meters west in 60.0 seconds. She then walks 25.0 meters east in 40.0 seconds. What is her average velocity for the trip?

(01.08 HC)During an experiment, the time of an object was measured every 20 meters. Each researcher measured the object’s motion on different surfaces, noted as A, B, C, and D. Their average data of the trials are shown below. Distance (cm) 0 20 40 60 80 100 Time A (s) 0 5.23 10.11 14.68 18.54 22.36 Time B (s) 0 4.66 9.33 13.97 18.63 23.31 Time C (s) 0 3.57 7.44 11.32 16.98 23.28 Time D (s) 0 5.00 15.00 40.00 60.00 85.00 Which of the surfaces allowed the object to increase its speed the entire distance of travel?

(01.05 LC)A graph from an experiment is given below.Which of the following is the independent variable?

(01.09 LC)A graph is presented below, representing an object’s motion.Which of the following times is the object at rest?

(01.08 HC)During an experiment, the time of an object was measured every 20 meters. Each researcher measured the object’s motion on different surfaces, noted as A, B, C, and D. Their average data of the trials are shown below. Distance (cm) 0 20 40 60 80 100 Time A (s) 0 5.23 10.11 14.68 18.54 23.36 Time B (s) 0 4.66 9.33 13.97 18.63 23.31 Time C (s) 0 3.57 7.44 11.32 16.98 23.28 Time D (s) 0 5.00 15.00 40.00 60.00 85.00 Which of the surfaces caused the fastest object to slow down the most?

(01.10 LC)Which of the following shows a change of velocity?

(01.07 MC)The position of a driver each hour is shown on the graph below.What is the car’s average speed from the beginning of the trip until time t = 4.5 hour?

2.         Describe 2 factors that affect the rate of a chemical reaction.  (4 Points)