Hector went to the grocery store by heading due north at 3 m/s, then turning east and continuing at the same speed for another three blocks. Which of the following is true about Hector's velocity? a с Hector's velocity changed because his speed changed. Hector's velocity did not change because his direction did not change. Hector's velocity did not change because his speed did not change. Hector's velocity changed because his direction changed.

Hector went to the grocery store by heading due north at 3 m/s, then turning east and continuing at the same speed for another three blocks. Which of the following is true about Hector's velocity? a с Hector's velocity changed because his speed changed. Hector's velocity did not change because his direction did not change. Hector's velocity did not change because his speed did not change. Hector's velocity changed because his direction changed.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter3: Vectors And Two-Dimensional Motion

Section: Chapter Questions

Problem 5WUE: A hiker walks 3.00 km north and then 4.00 km west, all in one hour and forty minutes, (a) Calculate...

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A student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 18.0 min. (a) What was her average speed? (b) If the straight-line distance from her home to the university is 10.3 km in a direction 25.0° south of east, what was her average velocity? (c) If she returned home by the same path 7 h 30 min after she left, what were her average speed and velocity for the entire trip?
4. A stone is thrown horizontally. In 3 seconds after the stone began to move, the numerical value of its velocity was 1.25 times its initial velocity. Find the initial velocity of the stone. Free fall acceleration is g = 10 m/s?. Disregard the resistance of the air. A) 40 m/s. B) 45 m/s. C) 50 m/s. D) 55 m/s.
Directions 1. A car traveled at 380 minutes, how much does the car traveled in seconds? 2. The velocity of a train is 80.0 km/h, due west. One and a half hours later its velocity is 65.0 km/h, due west. What is the train’s average acceleration? 3. A car makes a trip due north for three-fourths of the time and due one-fourth of the time. The average northward velocity has a magnitude of 29 m/s, and the average southward velocity has a magnitude of 20 m/s. What is the average velocity (magnitude and direction) for the entire trip? 4. A honeybee leaves the hive and travels a total distance of 2 km before returning to the hive. What is the magnitude of the displacement vector of the bee? 5. A football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial speed of 5.00 m/s. in the absence of air resistance, how high does the coin go above its point of release? 6. A meteoroid is speeding through the atmosphere, traveling east…
Which of the following statements is NOT true? Select one: a. If the object moves at constant velocity, acceleration is zero. b. When the object’s velocity and acceleration are in opposite directions, then the speed decreases with time. c. When the object’s velocity and acceleration are in the same direction, then the speed decreases with time. d. Acceleration is a vector quantity.
2.What is the average speed and average velocity of a man who travelled 140 miles in 2 h to the west and move another 70 miles in 1 hour on the same direction? 3. A tourist bus moves at an average velocity of 60.0km/h for 4 h to the west. What is the total displacement of the bus? DO NOT FORGET TO SHOW THE GUFSA.
14. A dog travels from point A to point B in 4.0s. If the dog was displaced 12 m (E) , what was its velocity? a) 48 m/s (E) b) 3 m/s (E) c) 3 m/s d) 48 m/s
An object moving in the +x direction experiences an acceleration of +2.0 m/s?. This means the object A A) travels 2.0 m in every second. B E) No Answer B) is traveling at 2.0 m/s. D) is increasing its velocity by 2.0 m/s every second. E C) is decreasing its velocity by 2.0 m/s every second.
Multiple Choice Identify the choice that best completes the statement or answers the question. John goes for a run. From his house, he jogs north for exactly 5.0 min at an average speed of 8.0 km/h. He continues north at a speed of 12.0 km/h for the next 30.0 min. He then turns arqund and jogs south at a spe= of 15.0 km/h for 15.0 min Then he jogs south for another 20.0 min at 8.0 km/h. He walks the rest of the w home. 1. How many kilometers does John jog in total? a.) 3.4 km B. 12.5 km с. 13.1 km d. 785 km 2. How far will John have to walk to get home after he finishes jogging? & 5.58 km d. 15.0 km 15 km 0.0 km eisprarement a. 0.25 km ich
2. A car is driven 1200 m north at 20.0 m/s and then driven 1600 m east at 25.0 m/s. What is the magnitude of the average velocity for this trip? a) 16.1 m/s b) 22.6 m/s c) 31.3 m/s d) 11.3 m/s e) 62.2 m/s
1. As part of an exercise program, a woman walks south at a speed of 2.00 m/s for 60.0 minutes. She then turns around and walks north a distance 3000 m in 25.0 minutes. What is the woman's average velocity during her entire motion? A) 0.824 m/s south B) 1.93 m/s south C) 2.00 m/s south D) 1.79 m/s south 2. The motion of a particle is described in the velocity versus time graph shown in the figure. We can say that its speed. Îu (m/s) 3+ 8 91 (s) -3+ A) increases. B) decreases. C) increases and then decreases. D) decreases and then increases.
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