2. An object is moving in a circle at a constant speed in a 'clockwise fashion.' A 'God's eye' view of the circle and the object's location is shown. B H. The vector arrow that best represents the direction of the velocity at the indicated location (9 o'clock) is E because the direction of the velocity and how it leaves the circular path.
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- 17. For a projectile, the y-axis motion occurs as a result of the gravitational action on the projectile and this gives way to its fall toward the Earth in parabolic motion. a. True b. False 18. The sum of two or more vectors is called a complementary vector a. True b. FalseQUESTION 5 Which of the following is not being described by a vector? a. A car travels at a constant speed of 20 m/s due east. b. A camper sees lightning strike 600 m away. C. A spaceship travels in a straight line from the earth to the moon. d. The position of a ship relative to an observer in a lighthouse is 3.0 miles at 37° N of E. e. The acceleration due to gravity acting on a falling brick is 9.81 m/s verticallky downward.A search and rescue helicopter travels at constant speed in a horizontal plane. The figure below shows a portion of the path traveled by the helicopter, as viewed looking down from above. The helicopter's path includes three straight portions between points "1" and "2", points "4" and "5", and points "7" and "8", each of which has a length of 4000 m, as shown in the figure. It takes the helicopter 2000 seconds to travel along each of these straight portions of its path. The semi-circular portions of the path (also shown in the figure) have the same radius R=500m. +y YNorth) 8. 4 4000 m A semi-circle is one half of a circle. East 6.
- 1. On the moon, the time, in seconds, it takes for an object to fall a distance, d, in feet, is given by the function f(d) = 1.11va. a. Determine f(5) and explain what it represents. b. The South Pole-Aitken basin on the moon is 42,768 feet deep. Determine a reasonable domain for a rock dropped from the rim of the basin.An object moves along the xy-plane. At some instant, its velocity and acceleration are - (3 m/s) } , ā = (0.5 m/s²) î – (0.2 m/s²) j. At this instant, the object is 7. = A. speeding up and following a curved path. B. speeding up and moving in a straight line. C. slowing down and following a curved path. D. slowing down and moving in a straight line. E. none of these.4. A plane traveling at 192 km/h [N] is blown eastward by the wind with a speed of 56.0 km/h. What is the velocity of the plane with respect to the ground? a. 1.36 x102 km/h [E 16.3o S]b. 2.00x102 km/h [N 16.3o E]c. 2.00x102 km/h [N 73.7o E]d. 2.48x102 km/h [E 73.7o S]e. 1.36 x102 km/h [N 73.7o E]
- Prior to landing at the airport, an airplane flies at a constant speed in a circular course with aradius of 5000 meters. An observer notices that the plane completes each round trip in 400seconds.a. What is the speed of the airplane? b.Whats the centripetal acceleration?8. A car is moving north at a speed of 25 m/s. A child in the back seat of the car throws a toy to the passenger in the front seat with a speed of 10 m/s in the direction forward 50° right (relative to the car). a) Draw a vector diagram to illustrate the situation. b) Calculate the speed and direction of the toy relative to the road.Projectile Motion and Relative Motion 1. You want to see if you can throw a rock across a ravine that is 19.4 m wide. The other side of the cliff is 5.9 m below your side. You throw the rock at 12.1 a. How much time does it take for the rock to travel the horizontal distance between the two edges of 45° above the horizontal. the ravine? b. What is the vertical position of the rock at this time?
- Q2. A plane has an airspeed of 915 km/h. The pilot sets the heading at [S34°E]. There is an 84 km/h wind headed [W12°N]. [A7, C4] a) Draw and label the vector diagram for the wind and plane's velocities. b) Calculate the velocity of the plane as seen by an observer on the ground.A 2kg toy is moving in a circle of radius 2.5 m with a speed of 3m/s.Calculate the centripetal acceleration of the toy? choose one correct answer with the correct units. A. 3.6 m/s^2 B. 1.2 m/s^2 C. 3.6 m/s D. 0.833 m/s^2A object is moving from ground at 70 meter per second and an angle of 75 degrees from horizontal. what is the horizontal dispalcement when the object reaches the ground? a. 226 m b. 154 m c. 250 m d. 125 m e. 233 m