1. After ring a cannon ball, the cannon moves in the opposite direction from the ball. This an example of: A. Newton's First Law B. Newton's Second Law C. Newton's Third Law D. Newton's Law of Gravitation E. None of the above 2. In the absence of an external force, a moving object will A. slow down and come to a stop B. speed up C. move with a constant speed in a straight line D. turn to the right E. turn to the left 3. A passenger who is standing and facing forward in a moving bus suddenly falls forward. This can be an indication of which of the following? A. The bus speeds up. B. The bus slows down. C. The bus doesn't change its speed. D. The bus turns to the right. E. The bus turns to the left. 4. A heavy box sits on a oor. The net force on the box can be represented as which of the following? A. Non-zero vector pointing up B. Non-zero vector pointing down C. Non-zero vector pointing left D. Non-zero vector pointing right E. It is zero 5. A loaded truck collides with a car causing a large amount of damage to the car. Which of the following is true about the collision? A. The force on the truck is greater than the force on the car. B. The force on the car is greater than the force on the truck. C. The force on the truck is the same in magnitude as the force on the car. D. During the collision, the truck has a greater displacement than the car. E. During the collision, the truck has a greater acceleration than the car. 6. The Earth pulls down on a railroad passenger car with an action force of 2x105 N. Which of the following is the reaction force? A. The car pulls up on the Earth with 2x105 N B. The car pushes down on the railroad tracks with 2x105 N C. The railroad tracks push up on the car with 2x105 N D. The buoyant force pushes up on the car with 2x105 N E. The car pushes down on the Earth with 2x105 N 7. A railroad passenger car pushes down on the railroad tracks with a force of 2x105 N. Which of the following is the reaction force? A. The car pulls up on the Earth with 2x105 N B. The car pushes down on the railroad tracks with 2x105 N C. The railroad tracks push up on the car with 2x105 N D. The buoyant force pushes up on the car with 2x105 N E. The car pushes down on the Earth with 2x105 N Multi-Correct: Students will need to select all the correct answers to the question below in order to earn credit. 8. Which of the following is an inertial reference frame? A. Amusement Park Carousel (merry-go-round) B. Automobile traveling at a constant velocity C. Automobile rounding a curve at a constant speed D. International Space Station orbiting the earth and traveling at a constant speed E. Spaceship traveling at a constant speed in a straight line Multi-Correct: Students will need to select all the correct answers to the question below in order to earn credit. 9. Which of the following are true about the kinetic friction and the static friction forces? A. Kinetic friction force is constant during an object's motion B. Static friction force does not change with an applied force C. The coefficient of static friction is greater than the coefficient of kinetic friction D. The coefficient of static friction is less than the coefficient of kinetic friction E. Static friction force is in the direction of the net applied force10. A box that weighs 25 N is pulled by an applied force of 10 N. The coefficient of static friction between the box and the surface is 0.5. The box will: A. start moving and will continue to increase its velocity B. start moving and maintain a constant velocity C. start moving and continue to increase its acceleration D. not move E. start moving and then slow to a stop 11. A 25 N box is pulled across a rough surface by an applied force of 22 N. The coefficient of kinetic friction between the box and the surface is 0.3. Find the acceleration of the box. Use g = 10 m/s2. A. 2.9 m/$2 D. 8.8 m/$2 B. 4.8 m/s2 E. 12 m/s2 C. 5.8 m/$2 12. An object is thrown straight up. How do we compare the net force on the object to its weight when it is at the highest point in the path? A. It is greater than the weight B. It is slightly less than the weight C. It is zero D. It is equal to the weight E. It can't be determined13. An elevator car weighs 5500 N. If the car accelerates upwards at a rate of 4.0 m/sZ, what is the tension in the support cable lifting the car? Use g = 10 m/sZ. A. 1600 N B. 3300 N C. 4400 N D. 7700 N E. 8700 N In the diagram below, a block of mass m slides down an inclined plane with a constant speed at an angle 19 with respect to the horizontal. Use this diagram for questions 14 through 18. 14. What is the x-component of the gravitational force? A. mg cosB B. mg sinEl C. mg tan6 D. mg E. zero 15. What is the y-component of the gravitational force? A. mg c059 B. mg sinB C. mg tan6 D. mg E. zero 16. What is the normal force applied to the block? A. mg cose B. mg sine C. mg tane D. mg E. zero 17. What is the kinetic friction force acting on the block? A. ukmg cose B. ukmg sine C. ukmg tane D. HKmg E. zero 18. Which of the following is true about the coefficient of kinetic friction? A. Uk = cose B. MK = sine C. Uk = tane D. HK = mg E. HK = 0In the diagram to the right, a block with a mass m = 5 kg slides down an inclined plane with an angle 9 = 37. The block maintains a constant acceleration a = 5.6 m/s2. (sin37 = 0.6, cos37 = 0.8). The coefficient of kinetic friction between the m block and the inclined surface is 0.05. Use this diagram to answer questions 19 through 22. 19. Which of the following diagrams best represents the gravitational force W, the frictional force f, and the normal force N that act on the block? X A. B. C. D. E. 20. What is the normal force on the block? A. 50 N B. 40 N C. 30 N D. 20 N E. 10 N21. What is the friction force between the block and the inclined plane? A. 2 N B. 5 N C. 6 N D. 30 N E. 40 N 22. The coefficient of static friction between the block and the inclined plane is 0.4 and 9:250. The block is placed on the inclined plane. The block will: A. not move B. start moving down the incline and then stop before it reaches the bottom of the incline C. start moving down the incline and continue to increase its velocity D. start moving and increase its acceleration until it reaches the bottom of the incline E. start moving and then its acceleration will decrease 3 kg 5 kg 23. A system of two blocks is accelerated by an applied force of magnitude F on the frictionless horizontal surface. The tension in the string between the blocks is: A. 3F B. 5F C. 3/8 F D. 1/3 F E. 1/5 F 24. A student pulls a wooden box along a rough horizontal floor at constant speed by means of a force P as shown to the right. Which of the following must be true? AN A. P > f and N f and N = W C. P = f and N > W D. P = f and N = W E. P m >m1. The heaviest ofthe three blocks is placed on a frictionless table. The system of three blocks is released from rest. What is the acceleration of block m? A. (m2 - m3 - m1)g/(m1 + m2 + m3) B. (m1 - m3 - m2)g/(m1 + m2 + m3) C. (m, - m1)g/(m1 + m2 + m) D. (m3 - mz- m1)g/(m1 + m2 + m3) E. (m1 - m3)g/(m1 + m2 + m3) 43. A lamp of mass m is suspended from two cables of unequal length as shown to the right. Which of the following is true about the tensions T1 and T2 in the cables? A. T. >T2 B. T1 = T2 C. T2 > T1 D. T. - T2 = mg E. T| + T2 = mg 44. A ball of mass m is suspended from two massless strings of an equal length as shown below. The tension force in each string is: A. 1/2 mgcost B. 2mgcost C. mgcost D . mg/(cose) E. mg/(2cose) m