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. False

1. In a practice session, Iris hits a ball horizontally with a speed of 36 m/s from a height of 3.1 m. The ball travels until it hits the ground. a. Determine the time the ball is in the air. b. Determine the horizontal distance traveled by the ball. c. Calculate the ball’s velocity as it hits the ground.

QUESTION 2 Which of the following is an accurate statement? O A. It is possible to add a scalar quantity to a vector. O B. Even though two vectors have unequal magnitudes, it is possible that their vector sum is zero. OC. Rotating a vector about an axis passing through the tip of the vector does not change the vector. OD. The magnitude of a vector is independent of the coordinate system used. O E. The magnitude of a vector can be zero even though one of its components is not zero.

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.

The magnitude V1 is 6.2 and it points along the negative x axis, while the magnitude V2 is 8.0 and it points at 40 degrees counter clockwise from the positive x axis.  A. What are the x and y components of vector V1? B. What are the X and Y components of vector V2? C. Determine magnitude of the sum V1+V2 D. Determine the angle of the sum V1+V2, measured counter clockwise from the positive x axis.

Three force vectors are added together.  One has a magnitude of 9 N, the second one a magnitude of 18 N, and the third a magnitude of 15 N.  What can we conclude about the magnitude of the net force vector?  Explain. I.       It must equal 42 N. II.     It cannot be 0 N.      III.    Anything from –42 N to +42 N.  IV.    It can be anything from 0 N to 42 N. V.     None of the above can be concluded.

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.

1. Let v = -51 + 53 be a vector in R². (a) Find v. (b) Find the angle, 0, in degrees, that v makes with the positive x-axis. (Answer in radians between 0 and 27.) (c) Find a unit vector that points in the same direction as v. Answer in component form.

Which of the following is a vector quantity?   A. The mass of a soccer ball. B. The length of a baseball bat. C. The width of a crater made by an asteroid. D. The displacement of a billiard ball after it is struck by the cue ball and collides with other balls.

MCQ 2. If C- [10 m, 30°] and D= [25 m, 130°], what is the magnitude of the sum of these two vectors? a. 20 m b. 35 m c. 15 m d. 25 m e. 50 m