# Physics Principles and Problems 2009

## Chapter 4: Forces in One Dimension

### Chapter Test Practice

 1 If the force used to generate the graph below were doubled, how, if at all, would the graph change? (17.0K) Need a Hint? A) The slope of the graph would be halved. B) It would not change. C) The y-intercept of the graph would be a non-zero number. D) The slope of the graph would be doubled. 2 A(n) __________ force acts on an object without touching it. Need a Hint? A) equilibrium B) net C) free-body D) field 3 An object that has a force exerted on it is called __________. Need a Hint? A) the system B) the environment C) the agent D) static 4 For the situation pictured below, if the table had a mass of 35 kg, and F1 = 20.0 N and F2 = 30.0 N, what would the acceleration be? (12.0K) Need a Hint? A) -3.5 m/s2 B) 0.70 m/s2 C) 1.4 m/s2 D) -0.28 m/s2 5 The specific, immediate cause of a force is called the __________. Need a Hint? A) contact B) system C) agent D) origin 6 Newton's second law states that __________. Need a Hint? A) a force is needed to keep an object moving B) the acceleration of an object is proportional to the net force exerted on the object and inversely proportional to the mass of the object. C) objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero D) all forces come in pairs 7 The net force is the __________. Need a Hint? A) force exerted on one surface by another when there is no relative motion between the two B) vector sum of all the outside forces on an object C) apparent weight D) friction between any two objects 8 Newton's first law of motion is often called the law of __________. Need a Hint? A) inertia B) equilibrium C) momentum D) acceleration 9 The vector sum of all the forces on an object is called the __________ force. Need a Hint? A) effort B) resistant C) composite D) net 10 The unit of force in the SI system is the __________. Need a Hint? A) newton B) quantum C) pascal D) magnum 11 An object that experiences a push or a pull has a(n) __________ exerted on it. Need a Hint? A) environment B) inertia C) system D) force 12 A(n) __________ force acts on an object only by touching it. Need a Hint? A) field B) tactile C) contact D) inert 13 Newton's first law of motion states that __________. Need a Hint? A) all forces come in pairs B) the acceleration of an object is proportional to the net force exerted on the object and is inversely proportional to the mass of that object. C) air does not exert a force D) objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero 14 For the situation pictured below, if F1 = 200 N and F2 = 500 N, what would Fnet be? (12.0K) Need a Hint? A) -700 N B) -300 N C) 300 N D) 700 N 15 An object is in equilibrium when __________. Need a Hint? A) its acceleration is constant B) the net force on it is zero C) three or more forces act on it D) the equilibrant is greater than zero 16 For the woman pictured below, the scale reads 120% of her weight. What is the acceleration of the elevator? (7.0K) Need a Hint? A) -0.2g B) 1.2g C) 0.8g D) 0.2g 17 On Earth, a scale shows that you weigh 490 N. What is your mass? Need a Hint? A) 22 kg B) 50 kg C) 100 kg D) 75 kg 18 The weight force is defined as __________. Need a Hint? A) Fg = m + g B) Fg = ma C) Fg = mg D) (1.0K) 19 Which of the following statements is true? Need a Hint? A) Weight is the measure of the amount of matter in an object. B) Weight is a measure of inertia. C) Weight can change when acceleration due to gravity changes. D) Mass is a force. 20 The force exerted by a fluid on an object moving through the fluid is called the __________. Need a Hint? A) apparent weight B) net force C) drag force D) terminal velocity 21 How do you calculate your weight in newtons? Need a Hint? A) (9.80 m/s2)sin ? B) 2?(m) C) (0.0K) D) (9.80 m/s2)(m) 22 If the box pictured below has a mass of 6.0 kg, what will the normal force of the table on the box be? (9.0K) Need a Hint? A) 50 N B) 8.8 N C) 160 N D) 9.8 N 23 Newton's third law of motion states that __________. Need a Hint? A) for any force caused by object A on object B, there is an equal and opposite force caused by object B on object A. B) objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero C) the acceleration of an object is proportional to the net force exerted on the object D) a force is needed to keep an object moving 24 If the box pictured below has a mass of 6.0 kg, what will the normal force of the table on the box be? (9.0K) Need a Hint? A) 8.8 N B) 9.8 N C) 50 N D) 110 N 25 A 75-kg man pushes a 12-kg child in a swing with a force of 3.0 N. What is the force on the man from the child? Need a Hint? A) 3.0 N B) 0.25 N C) -3.0 N D) 0.040 N