9.b. Newton's 2nd Law of Motionc. Newton's 3rd Law of MotionIf two forces act on an object in the same direction, the net force is thea. difference of the two forces.b. sum of the two forces.c. only one of the forces acts on the object.d. neither force can affect the object.11. An object remains at rest or remains in constant motion unless it is subjectby an unbalanced force; this statement refers toa. Newton's second lawb. Newton's first lawc. Newton's third lawd. Boyle's law13. Newton'slaw of motion states the "The acceleration of an objectas produced by a net force is directly proportional to the magnitude of thenet force, in the same direction as the net force, and inversely proportionalto the mass of the object."a. secondb. thirdc. firstd. fourth15. A force of 10 N pulls an object to the right, and a force of 7 N pulls to theleft, what is the net force?a. 17 N to the rightb. 70 N to the leftc. 3 N to the rightd. 1.5 N to the left10. What two parts do all electromagnets have?c. gravityd. net force14.16.a. A coil of wire and a source of electric current such as a batteryb. A coil of wire and a piece of paper12.A car is at rest due to balanced forces. What is this an example of?a. Newton's Second Lawb. Newton's First Lawc. Newton's Third Lawd. Gravitational Lawc. A battery and a needled. A battery and a piece of plasticThe constant force of attraction between all objects with mass is calleda. inertia.b. adhesion.c. gravity.d. electromagnetism.What is a Newton?a. a unit of measure for weightb. a unit of measure for distancec. a unit of measure for massd. a unit of measure for force

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Description: 9.b. Newton's 2nd Law of Motionc. Newton's 3rd Law of MotionIf two forces act on an object in the same direction, the net force is thea. difference of the two forces.b. sum of the two forces.c. only one of the forces acts on the object.d. neither fo

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9. If two forces act on an object in the same direction, the net force is the a. difference of the two forces. b. sum of the two forces. c. only one of the forces acts on the object. d. neither force can affect the object. 11. An object remains at rest or remains in constant motion unless it is subject by an unbalanced force; this statement refers to a. Newton's second law b. Newton's first law c. Newton's third law 10. What two parts do all electromagnets have? a. A coil of wire and a source of electric current such as a battery b. A coil of wire and a piece of paper c. A battery and a needle d. A battery and a piece of plastic 12. A car is at rest due to balanced forces. What is this an example of? a. Newton's Second Law b. Newton's First Law c. Newton's Third Law d. Gravitational Law

9. If two forces act on an object in the same direction, the net force is the a. difference of the two forces. b. sum of the two forces. c. only one of the forces acts on the object. d. neither force can affect the object. 11. An object remains at rest or remains in constant motion unless it is subject by an unbalanced force; this statement refers to a. Newton's second law b. Newton's first law c. Newton's third law 10. What two parts do all electromagnets have? a. A coil of wire and a source of electric current such as a battery b. A coil of wire and a piece of paper c. A battery and a needle d. A battery and a piece of plastic 12. A car is at rest due to balanced forces. What is this an example of? a. Newton's Second Law b. Newton's First Law c. Newton's Third Law d. Gravitational Law

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch....

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A force is a quantity that is ___ of producing motion or a change in motion. (3.1)
. As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. (a) What is the baseball’s acceleration in m/s and in Ws? (b) What is the size of the force acting on it?
The force on a baseball as with a bat can be more than 8,000 lb. No human can push on a bat with that much force. What is happening in this instance?
A motorcycle and rider have a total mass equal to 300 kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of 5 m/s2. What is the net force on the motorcycle?
A 63.0-kg sprinter starts a race with an acceleration of 4.20m/s2. What is the net external force on him?
Describe the path of a moving body in the event that (a) its acceleration is constant in magnitude at all times and perpendicular to the velocity, and (b) its acceleration is constant in magnitude al all times and parallel to the velocity.
A net force ___. (3.1) (a) can produce motion (b) is a scalar quantity (c) is capable of producing a change in velocity (d) both (a) and (c)
. The Kingda Ka roller coaster in New Jersey is the world’s tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m/s (128 mph) in just 3.5 s. (a) What is the acceleration experienced by passengers on this ride in m/s2? In g’s? (b) If a certain passenger has a mass of 65 kg, what is the force in newtons that acts on him during the launch phase of this ride? What is the force in pounds?
(a) Give an example of different net external forces acting on the same system to produce different accelerations. (b) Give an example of the same net external force acting on systems of different masses, producing different accelerations. (c) What law accurately describes both effects? State it in words and as an equation.
The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what is the mass of the car plus its occupants? Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton's laws of motion. For this situation, draw a free-body diagram and write the net force equation.
While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
A weight lifter stands on a bathroom scale. (a) As she pumps a barbell up and down, what happens to the reading on the scale? (b) Suppose she is strong enough to actually throw the barbell upward. How does the reading on the scale vary now?