# PHYSICS 11- Module 2 Physics Free Body Diagram Worksheet.

Physics 11 Module 2 Test A On-Line Course Physics 11 MODULE 2 Test A Name_________________________ Multiple Choice Section ________ 26 Written Response Section ________ 32 Total ______ = _________% 58 Examination Instructions: When using your calculator: • use the programmed value of  rather than the approximation of 3.14. • rounding should occur only in the final step of the solution. Diagrams are not necessarily drawn to scale. FORMULA SHEET IS PROVIDED AT END OF EXAM Version 1 Page 1 of 18 Test A Physics 11 Module 2 Test A On-Line Course PART A: MULTIPLE CHOICE INSTRUCTIONS: For each question, select the best answer and record your choice in the space provided. 1. Which of the following is another expression for “force of gravity”? A. mass B. weight C. net force D. normal force 1. ____________ 2. A cart is travelling to the left at constant velocity. Which free-body diagram best represents the forces acting on the cart? A. B. C. D. 2. ____________ 3. What is the gravitational force acting on a 48.6 kg desk in the physics room? A. 4.96 N B. 48.6 N C. 476 N D. 4.76 x 105 N 3. ____________ Version 1 Page 2 of 18 Test A Physics 11 Module 2 Test A On-Line Course 4. Which of the following statements is always correct about an object in motion? A. It tends to keep on moving. B. A net force must be acting on it. C. It tends to accelerate (i.e., speed up). D. The net force acting on it must be zero. 4. ____________ 5. An object is given an acceleration of 5.0 m/s2 by a force of 10 N. What is the mass of the object? A. 0.50 kg B. 2.0 kg C. 15 kg D. 50 kg 5. ____________ 6. In the absence of air resistance, a ball of mass m is tossed upward to reach a height of 20 m. Given that Fg = mg, what is the net force on the ball at the 10-m position (half way up)? A. mg B. mg/2 C. mg/4 D. 2mg 6. ____________ 7. A student drags a 50 kg weight across the floor with a force of 220 N. The force of friction between the weight and the floor is 200 N. What is the acceleration of the weight? A. 8.4 m/s2 B. 4.4 m/s2 C. 4.0 m/s2 D. 0.40 m/s2 7. ____________ 8. An 8.0 kg chair on casters is given an initial velocity of 10 m/s and then is allowed to roll along the floor. A frictional force of 2.0 N opposes its motion. What is the acceleration of the chair? A. 0 m/s2 B. -0.25 m/s2 C. 4.0 m/s2 D. -4.0 m/s2 8. ____________ Version 1 Page 3 of 18 Test A Physics 11 Module 2 Test A On-Line Course 9. An 83 kg man stands on a spring scale while accelerating upwards in an elevator. If the scale indicates that his apparent ‘weight’ is 9.8 x 102 N, what is the magnitude of the acceleration of the elevator? A. 1.0 m/s2 B. 2.0 m/s2 C. 9.8 m/s2 D. 12 m/s2 9. ____________ 10. The diagram to the left shows a 12.0 kg mass being pulled upward with a force ‘F’. This causes the mass to also accelerate upwards at 1.45 m/s2. F 1.45 m/s2 What is the magnitude of force F? A. 17.0 N B. 101 N 12.0 kg C. 118 N D. 135 N 10. ____________ 11. Whenever one body exerts a force on a second body, the second body exerts a force on the first that is… A. B. C. D. slightly smaller in magnitude and in the same direction. slightly larger in magnitude and in the opposite direction. equal in magnitude and in the same direction. equal in magnitude and in the opposite direction. 11. ____________ 12. A 55 kg student stands on the platform of a large spring scale, causing the spring to compress 0.069 m. What is the spring constant? A. 37 N/m B. 81 N/m C. 8.0 x 102 N/m D. 7.8 x 103 N/m 12. ____________ Version 1 Page 4 of 18 Test A Physics 11 Module 2 Test A On-Line Course 13. A spring of force constant 45 N/m is used to pull a block along a level surface at constant speed. While this occurs, the spring is stretched 12 cm. What force was used to pull the block? A. 3.8 N B. 5.4 N C. 380 N D. 540 N 13. ____________ 14. A doorknob is an example of which type of simple machine? A. B. C. D. a pulley a lever a wheel and axle an inclined plane 14. ____________ 15. What is the mechanical advantage of the inclined plane shown below? 2.5 m 6.0 m A. B. C. D. 2.4 2.5 2.6 6.5 15. ____________ Version 1 Page 5 of 18 Test A Physics 11 Module 2 Test A On-Line Course 16. Which type of simple machine is represented by the diagram below? Physics Is Phun A. B. C. D. an inclined plane a first class lever a second class lever a third class lever 16. ____________ 17. Which of the following statements about friction and simple machines is correct? A. Friction has no effect on the mechanical advantage of a simple machine. B. Friction causes the actual mechanical advantage to be less than the ideal mechanical advantage. C. Friction causes the ideal mechanical advantage to be less than the actual mechanical advantage. D. Friction always causes the mechanical advantage to be less than 1. 17. ____________ Version 1 Page 6 of 18 Test A Physics 11 Module 2 Test A On-Line Course Examine the system to the right, showing a pulley lifting a crate of mass 95 kg. F Use this information to answer the following three questions (18-19). m = 95 kg 18. What is the mechanical advantage of this pulley system? A. 3 B. 4 C. 5 D. 6 18. ____________ 19. What force F is needed to lift the crate? A. B. C. D. E. 95 N 233 N 466 N 931 N 3720 N 19. ____________ 20. Which of the following methods for moving the block would result in the smallest force of friction? Q A. Q R B. R S C. S T D. T 20. ____________ Version 1 Page 7 of 18 Test A Physics 11 Module 2 Test A On-Line Course 21. A mass of 2.0 x 102 kg sits on a level surface. If the minimum horizontal force required to move the mass is 1.5 x 103 N, what is the coefficient of static friction between the mass and the surface on which it rests? A. 7.5 B. 1.3 C. 0.77 D. 0.13 21. ____________ The diagram to the right shows a 5.0 kg block being pulled upward to the right by a 24 N force. The coefficient of sliding friction between block and surface is 0.47. Use this information to answer the next two questions (22 and 23). 24 N 30º  = 0.47 22. What is the normal force acting on the block? A. 12 N B. 24 N C. 37 N D. 49 N 22. ____________ 23. Determine the acceleration of the block as it slides along the surface. A. 0.25 m/s2 B. 0.45 m/s2 C. 0.68 m/s2 D. 4.2 m/s2 23. ____________ Version 1 Page 8 of 18 Test A Physics 11 Module 2 Test A On-Line Course 24. The diagram to the right shows a 13.0 kg block at rest on an inclined surface sloped at 25.0 to the horizontal. What is the force of friction that keeps the block stationary? A. B. C. D. 13.0 kg 25.0 53.8 N 90.7 N 116 N 127 N 24. ____________ 25. A student pulls a system of masses along a level surface as shown below, causing an acceleration to the right of 1.62 m/s2. The coefficient of sliding friction for each mass is listed. a = 1.62 m/s2 Fapp 55.0 kg 18.0 kg  = 0.273  = 0.340 What is the magnitude of the applied force Fapp used by the student to accelerate the masses? A. B. C. D. 118 N 147 N 265 N 325 N 25. ____________ Version 1 Page 9 of 18 Test A Physics 11 Module 2 Test A On-Line Course 26. Three blocks of different masses are connected as shown below and held in place. The coefficient of friction between the 12 kg block and the table is 0.14. 12.0 kg T  = 0.14 5.0 kg 8.0 kg The system is released and allowed to accelerate. Find the tension in the cable labeled T. A. B. C. D. 49 N 52 N 65 N 78 N 26. ____________ 27. Examine the two-mass system to the right, where friction forces on the cart and pulley are negligible. 4.8 kg Once released, determine the acceleration and direction of the 4.8 kg cart. 2.5 kg A. B. C. D. E. 2 0.52 m/s down-slope 0.52 m/s2 up-slope 0.79 m/s2 down-slope 0.79 m/s2 up-slope 3.1 m/s2 down-slope 37° 27. ____________ Version 1 Page 10 of 18 Test A Physics 11 Module 2 Test A On-Line Course PART B: WRITTEN INSTRUCTIONS: Work space has been incorporated into the space allowed for answering each question. Place the final answer for each question in the space provided. Full marks will NOT be given for the final answer only. 1. A small space probe that weighs 2.85 x 103 N on Earth is sent out to a large asteroid where the gravitational field strength is 0.644 N/kg. a) What is the
mass of the space probe? a) ____________ 2 marks b) How much will the probe weigh on the asteroid? b) ____________ 2 marks 2. A cart with a mass of 65 kg is shown below. A force of 270 N is used to pull the cart to the left. A friction force of 83 N opposes this motion. a) Calculate the weight of the cart. Then draw a free-body diagram directly on the cart, showing all the forces, their values and proper directions. 65 kg 3 marks Version 1 Page 11 of 18 Test A Physics 11 Module 2 Test A On-Line Course b) Determine the acceleration of the cart. b) ____________ 3 marks 3. A cable pulls a 5.1 x 103 kg elevator vertically upward with an acceleration of 2.4 m/s2. a) What is the net force acting on the elevator? a) ____________ 1 mark b) Calculate the tension force on the cable while the elevator is accelerating. b) ____________ 3 marks c) A student stands inside the elevator as it accelerates. Compared to her actual weight, what will be her apparent weight while this motion occurs? Check one below.  greater than actual weight  less than actual weight  same as actual weight 1 mark Version 1 Page 12 of 18 Test A Physics 11 Module 2 Test A On-Line Course 4. A piano of mass 224 kg rests on a level floor, where the coefficient of static friction is s = 0.35 and the coefficient of kinetic friction is k = 0.18. a) What is the minimum horizontal force needed to begin sliding the piano along the floor? a) ____________ 3 marks b) If this minimum force is used and the piano begins to slide, what will be its initial acceleration? b) ____________ 3 marks Version 1 Page 13 of 18 Test A Physics 11 Module 2 Test A On-Line Course 5. A block of mass 4.8 kg is held against a brick wall wall and is held in place by a force of 47.0 N, as shown in the diagram. m = 4.80 kg 35º Fapp = 47.0 N a) Calculate the horizontal and vertical components of the applied force. horizontal force: ____________ 1 mark vertical force: ____________ 1 mark b) Determine the magnitude of the static friction force acting between the wall and the block. b) ____________ 3 marks Version 1 Page 14 of 18 Test A Physics 11 Module 2 Test A On-Line Course 6. An ice block of mass 3.5 kg slides down a slope at an angle of 28º to the horizontal with an acceleration of 1.6 m/s2. 3.5 kg =? Determine the coefficient of sliding friction between the block and the inclined surface. a = 1.6 m/s2 28º 6. ____________ 6 marks Version 1 Page 15 of 18 Test A Physics 11 Module 2 Test A On-Line Course Physics 11 Formula Sheet d = vt Kinematics v = vo + at Energy Fnet = ma Fload d effort = Feffort dload MA = W = Fd W = E Ep = mgh P= Ek = W t 1 2 mv 2 Ethermal = mcT Wout Pout = Win Pin Waves T= 1 f v = f Electric Circuits I= Q t V = IR Rseries = R1 + R2 + … + Rn Version 1 Ffr = FN Fg = mg F = -kx efficiency = v + vo 2 1 d = vot + at 2 2 v 2 = vo2 + 2ad Forces v= Page 16 of 18  v  f = fs   v  v  s  P = IV 1 Rparallel = 1 1 1 + + … + R1 R2 Rn Test A Physics 11 Module 2 Test A On-Line Course Table of Constants Acceleration due to gravity near Earth’s surface. g = 9.8 m/s2 Speed of light………………………………………………. c = 3.00 x 108 m/s Elementary charge……………………………………….. e = 1.60 x 10-19 C Specific heat capacity c water……………………………………………. 4.18 x 103 J/kgC ice……………………………………………….. 2.06 x 103 J/kgC methanol………………………………………. 2.45 x 103 J/kgC iron………………………………………………. 4.46 x 102 J/kgC aluminum……………………………………… 9.03 x 102 J/kgC copper………………………………………….. 3.85 x 102 J/kgC lead………………………………………………1.30 x 102 J/kgC Metric Prefixes Basic unit (e.g., meter, gram , liter)……………. 1 centi- (c-)……………………………………………….. 0.01 milli- (m-)………………………………………………. 0.001 micro- (-)……………………………………………… 0.000 001 kilo- (k-)………………………………………………… 1000 mega- (M-)…………………………………………….. 1 000 000 giga- (G-)………………………………………………. 1 000 000 000 Version 1 Page 17 of 18 Test A Physics 11 Module 2 Test A On-Line Course Mathematical Equations For Right-angled Triangles: sin  = opposite hypotenuse Pythagorean theorem: cos  = adjacent hypotenuse , where tan  = opposite adjacent is the hypotenuse. Circle: Circumference = 2r Area = r2 Quadratic formula: The general quadratic equation Version 1 has the following roots: Page 18 of 18 Test A