11J produteu by the LabQue st and Furte sensor. or. Pre-Lab Assignment 1. A 40.0 kg box in resting on a horizontal floor. The coefficient of static friction between the box and the floor is 0.45. A varying horizontal force is being applied to the box. a. Draw a free body diagram of the box. b. Calculate the normal force, FN- C. What is the maximum static friction force on the box, f,? d. What is the magnitude of the applied force just before the box is slipping, Fopplied? 2. A 40.0 kg box in being pulled on a horizontal floor. The coefficient of kinetic friction between the box and the floor is 0.37. A constant horizontal force is being applied to the box. a. Draw a free body diagram of the box. b. Calculate the normal force, FN-

11J produteu by the LabQue st and Furte sensor. or. Pre-Lab Assignment 1. A 40.0 kg box in resting on a horizontal floor. The coefficient of static friction between the box and the floor is 0.45. A varying horizontal force is being applied to the box. a. Draw a free body diagram of the box. b. Calculate the normal force, FN- C. What is the maximum static friction force on the box, f,? d. What is the magnitude of the applied force just before the box is slipping, Fopplied? 2. A 40.0 kg box in being pulled on a horizontal floor. The coefficient of kinetic friction between the box and the floor is 0.37. A constant horizontal force is being applied to the box. a. Draw a free body diagram of the box. b. Calculate the normal force, FN-

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 114AP: A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30...

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A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30 degrees with the horizontal. The coefficient of kinetic friction between the sled and the snow is 0.20. (a) If the force Is 33 N, what is the horizontal acceleration of the sled? (b) What must the force be in order to pull the sled at constant velocity?
Suppose Kevin, a 60.0-kg gymnast, climbs a rope. (a) What Is the tension in the rope if he climbs at a constant speed? (b) What is the tension in the rope if he accelerates upward at a rate of 1.50m/s2 ?
Common Forces A leg is suspended in a traction system, as shown below (a) Which pulley in the figure is used to calculate the force exerted on the foot? (b) What is the tension In the rope? Here T is the tension, wleg is the weight of the leg, and w is the weight of the load that provides the tension.
(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.
A 20.O-g ball hangs from the roof of a freight car by a string. When the freight car begins to move, the string makes an angle of 35.0with the vertical. (a) What is the acceleration of the freight car? (b) What is the tension in the string?
. 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 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?
Suppose a 60.0-kg gymnast climbs a rope. (a) What is the tension in the rope if he climbs at a constant speed? (b) What is the tension in the rope if he accelerates upward at a rate of 1.50 m/s2?
A physics major is cooking breakfast en she notices that the frictional force between her steel spatula and Teflon trying pan is only 0.200 N. Knowing the coefficient of kinetic friction between the two materials, she quickly calculates the normal force. What is it?
Two small forces, F1=2.40i6.10tj N and F2=8.50i9.70j N , are exerted on a rogue asteroid by a pair of space tractors. (a) Find the net force. (b) What are the magnitude and direction of the net force? (c) If the mass of the asteroid is 125 kg, what acceleration does it experience (in vector form)? (d) What are the magnitude and direction of the acceleration?
A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. The ramp is tilted at 20 and is frictionless. (a) What Is the acceleration of the crate? (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration?
A history book is lying on top of a physics book on a desk, as shown below a free-body diagram is also shown. The history and physics books weigh 14 N and 18 N, respectively. Identify each force on each book with a double subscript notation (for instance, the contact force of the history book pressing against physics book can be described as F HP), and determine the value of each of these forces, explaining the process used.