AP Physics 1 Name: Unit 2: 2D Kinematics Test Period: Part 1: Multiple Choice - Choose the answers that best answers the questions below. If an exact answer is not present, chose the closest available answer. (4 points each) 1 . An object is at rest. Three forces are exerted are exerted on the object. One force is directed 10 N due south, and another is 10 N directed due east. Which of the following forces, when added to the other two, would make the total force be equal to zero? A) 10VZ N, directed northwest C) 10V2 N, directed southeast B) 10V3 N, directed northwest D) 10V3 N, directed southeast 2. Tim Tebow throws a baseball that travels a parabolic path as shown. At which of the following points is the speed of the baseball a maximum? A) A B) B C) C D) D 3. A machine launches a tennis ball at an angle of 250 above the horizontal. The ball returns to ground level. Which changes would necessarily decrease the time the ball is in the air? A) Decrease the launch angle and increase the ball's initial speed. B) Increase the launch angle and decrease the ball's initial speed. C) Increase the launch angle and keep the ball's initial speed the same. D) Decrease the launch angle and keep the ball's initial speed the same. 4. During football practice, a football is kicked with a speed of 22 m/s at an angle of 60.0 above the ground. At that instant, an observer rides past the football in a car that moves with a constant speed of 11 m/s in the same horizontal direction that the football travels. According to the observer in the car, the ball will: A) follow a parabolic path. B) follow a path that is straight up and down in the y direction. C) follow a path that is hyperbolic in the x-direction. D) follow a straight line that is angled with respect to the x direction. 5. A projectile is launched with speed v at angle of 30 above the horizontal. It travels a horizontal distance D before hitting the ground. Suppose the projectile had instead been launched at the same speed, v, but an angle of 60 above the horizontal. What would the new horizontal distance traveled by the projectile be? A) D/2 B) D/ 4 C) D D) 2D