1. Ignoring friction with the air, at what angle relative to the horizontal would a projectile travel the greatest horizontal distance?

Transcription

1 North arolina Testing Program EO Physics Sample Items Goal 1. Ignoring friction with the air, at what angle relative to the horizontal would a projectile travel the greatest horizontal distance? golf ball is hit and leaves the tee. Neglecting air friction, what relationship exists between the vertical component of the ball s velocity immediately after it is hit and the ball s velocity immediately before it lands? equal in magnitude; opposite in direction equal in magnitude; same direction. person throws a rock horizontally out of a window of a building with a speed of 10.0 m/s. The window is 30.0 m above the ground. How far from the building will the rock strike the ground? Final velocity will be greater than original velocity. Original velocity will be greater than final velocity m 4.7 m 30.6 m 61. m Page 1

2 North arolina Testing Program EO Physics Sample Items Goal 4. Several students in a physics lab set up an apparatus shown in the diagram below. M1 is a kg mass attached to a cord threaded through a glass tube holder and spun in a circular path nearly parallel to the floor m kg M 1 M What is the mass of M required to maintain a speed of 1.6 m/s and radius of 1.00 m? Neglect friction kg 0.81 kg 1. kg 1.6 kg 5. cannon fires a 5.00-kg projectile at a velocity of 00. m/s at an angle of 30.0 as shown below. What is the maximum height the projectile reaches? 510. m 1,00 m 1,770 m 3,530 m Page

3 North arolina Testing Program EO Physics Sample Items Goal 6. soccer player kicks a ball into the air toward the goal. Which statement best describes the vertical component of the ball s acceleration? cceleration increases then decreases. cceleration decreases then increases. 8. boat crosses a 500-meter wide river. The boat can maintain a maximum speed of 5 m/s, and the speed of the water in the river is m/s. What is the fastest time the boat can go from one side of the river to the other? 50 s 167 s cceleration increases. 109 s cceleration remains constant. 100 s 7. If a ball is thrown horizontally at the same time another ball is dropped from the same height, how do their flight times compare? N block is resting on an inclined plane. The horizontally thrown ball s time is greater. The horizontally thrown ball s time is less. oth times are the same. The horizontally thrown ball s time is sometimes greater and sometimes less. 30 What is the normal force on the block? 50.0 N 43.3 N 8.9 N 5.0 N Page 3

4 North arolina Testing Program EO Physics Sample Items Goal 10. Mass M is attached to a string and swung in a horizontal circular path around point as shown below. S R M X Q If the string breaks when the mass is at point X, which of the following describes the path the mass will take? a straight line toward a straight line toward Q a straight line toward R a curved path toward S frictional force between the tires and the road must exist in order to keep the car on the road? kg car rounds a curve with a radius of 100 m at a velocity of 5 m/s. What N N N N Page 4

5 North arolina Testing Program EO Physics Sample Items Goal 1. n object is moving in a circular path at a constant speed. Which of the following statements is true about the object? 13. n object moving in a horizontal circle with a radius of.80 m completes each lap in 3.00 s. What is the acceleration of the object? It is accelerating toward the center of the circle. It is accelerating along a path tangent to the circle. It is accelerating along a path directed away from the circle. It is accelerating along a path that follows the curvature of the circle. 1.3 m/s inward 1.3 m/s outward 36.8 m/s inward 36.8 m/s outward End of Goal Sample Items In compliance with federal law, including the provisions of Title IX of the Education mendments of 197, the epartment of Public Instruction does not discriminate on the basis of race, sex, religion, color, national or ethnic origin, age, disability, or military service in its policies, programs, activities, admissions or employment. Page 5

6 Goal nswers to EO Physics Sample Items 1. Objective.01 Thinking Skill: Generating orrect nswer:. Objective.01 Thinking Skill: pplying orrect nswer: 3. Objective.01 Thinking Skill: Integrating orrect nswer: 4. Objective.01 Thinking Skill: pplying orrect nswer: 5. Objective.01 Thinking Skill: pplying orrect nswer: 6. Objective.01 Thinking Skill: Integrating orrect nswer: 7. Objective.0 ssess the two dimensional motion of objects by using their component vectors. Thinking Skill: nalyzing orrect nswer: 8. Objective.0 ssess the two dimensional motion of objects by using their component vectors. Thinking Skill: nalyzing orrect nswer: 9. Objective.0 ssess the two dimensional motion of objects by using their component vectors. Thinking Skill: pplying orrect nswer: North arolina Testing Program educational purposes only; not for personal or financial gain.

7 Goal nswers to EO Physics Sample Items 10. Objective.04 nalyze and evaluate uniform circular motion. Thinking Skill: nalyzing orrect nswer: 11. Objective.04 nalyze and evaluate uniform circular motion. Thinking Skill: nalyzing orrect nswer: 1. Objective.04 nalyze and evaluate uniform circular motion. Thinking Skill: nalyzing orrect nswer: 13. Objective.04 nalyze and evaluate uniform circular motion. Thinking Skill: pplying orrect nswer: North arolina Testing Program educational purposes only; not for personal or financial gain.