Concept explainers
Construct Your Own Problem Consider people pushing a toboggan with four children on it up a snow-covered slope. Construct a problem in which you calculate the acceleration of the toboggan and its load. Include a free-body diagram of the appropriate system of interest as the basis for your analysis. Show vector forces and their components and explain the choice of coordinates. Among the things to be considered are the forces exerted by those pushing, the angle of the slope, and the masses of the toboggan and children.
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
College Physics
Additional Science Textbook Solutions
Physics: Principles with Applications
College Physics (10th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
- (a) Find an equation to determine the magnitude of the net force required to stop a car of mass m, given that the initial speed of the car is v0 and the stopping distance is x . (b) Find the magnitude of the net force if the mass of the car is 1050 kg, the initial speed is 40.0 km/h, and the stopping distance is 25.0 m.arrow_forwardGive reasons for the answers to each of the following questions: (a) Clan a normal force be horizontal? (b) Can a normal force be directed vertically downward? (c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can the normal force be different in magnitude from the gravitational force exerted on the ball? (d) Can the force exerted by the floor on the hall be different in magnitude from the force the ball exerts on the floor?arrow_forwardA worker is attempting to lift a 55.0-kg palette of bricks resting on the ground by means of a rope attached to a pulley. a. Before the worker pulls on the rope, what is the force exerted by the ground on the palette? b. The worker exerts a force of 295 N downward on his end of the rope. What is the force exerted by the ground on the palette? c. If the worker doubles the downward force, what is the force exerted by the ground on the palette?arrow_forward
- Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in the figure(Figure 1). The sum of the forces FA and FB exerted on the unit by the horizontal cables is parallel to the line L, and FA=4300N. Part A Determine FB. Express your answer using two significant figures. Part B Determine the magnitude of FA+FB. Express your answer using two significant figures.arrow_forwardI had just asked this question, and I would like the answers for E,F, and G. A) Your(660N) physics teacher skis down an incline of 12 degrees to the right. The coefficient of kinetic friction between the skis and the snow is 0.01. Draw a free-body diagram of your physics teacher. B) Draw a free-body diagram with all forces parallel to an axis. Use the axis y' pointing up perpendicular to the slope and x' pointing down the slope. You may have to break up force vectors into their components to accomplish this. C) What is the normal force? (Magnitude and Direction) D) What is the friction force? (Magnitude and Direction) E) What is the net force? (Magnitude and Direction) F) What is their acceleration? (Magnitude and Direction) G) If she starts from rest, how far does she go in 10.0 seconds?arrow_forwardA person pushes on a stationary 125 N box with a force of 93N at 30 degrees below the horizontal. The coefficient of static friction between the box and the horizontal floor is 0.76. what is the normal force on the box? what is the friction force on the box? what is the largest the friction force could be? the person now replaces his push with a 93N pull at 30degrees above the horizontal. Find the normal force on the box in this case.arrow_forward
- Shown to the right is a block of mass m = 12.9 kg sitting on a ramp that makes an angle θ = 27° with the horizontal. This block is being pushed by a horizontal force F = 211 N. The coefficient of kinetic friction between the two surfaces is μ = 0.41. a. Write an equation for the acceleration of the block up the ramp using variables from the problem statement together with g for the acceleration due to gravity. b. Find the acceleration of the block up the ramp in m/s2.arrow_forwardThe diagram below shows an object of mass m= 20kg being acted upon by a force F=50N at an angle of θ=30o. The coefficient of kinetic friction between the object and the surface is 0.100. a.Draw a Free Body diagram for the object. Be sure to show all forces as well as the reference x,y axis. and Using Newton’s 2nd law, write the force equations for both the x and the y directions. Write these equations in terms of the letters m, F, θ, FN, g, f (little f stands for the friction force). X-direction: _______________________________________________________________ Y-direction:________________________________________________________________ b.Solve for the Normal Force c .Use your answer from part b to find the frictional force. d .Solve for the acceleration of the object. e.If this object was originally moving at 4 m/s, how fast would it be moving after 8 seconds? f .How far will…arrow_forwardThe following steps summarize the strategy for solving two-dimensional force problems that require Newton's second law of motion. Place the steps in the correct order. (a) Solve the problem using Newton's second law of motion. (b) Determine the x- and y-components of each force, and write the necessary equations. (c) Identify the given variables and the required variables. (d) Choose a coordinate system, and draw an FBD. Include a label for each force. (e) Identify the object on which the forces act. (f) Read the problem before trying to solve it.arrow_forward
- 1) The block on a 60° inclined plane weighs 100 pound and is held by the minimum possible force T as shown in the figure. The coefficient of both static and kinetic friction between the block and the inclined plane is 0.2, and the pulleys are frictionless. T а. Draw the free body diagram (FBD) of the block showing all forces and their directions acting on it. b. Compute all unknown forces including T shown in your FBD. Now if you want to move the block upward on the inclined plane С. by applying minimum possible force T then draw the FBD of the block showing all forces with directions acting on it. d. Now assume the pulleys are stuck (do not rotate any more) and the 60° rope slides over the stuck pulleys as the block moves up. the coefficient of both static and kinetic friction between the pulley surface and the rope is 0.1. Draw the FBD of the block showing all forces with directions acting on the block when the block is pulled upward by the minimum rope force T. е. For the stuck…arrow_forwardA girl is snowmobiling 223 m up a slope that is 250 from the horizontal. The combined mass of the girl and the snowmobile is 225 kg, and the coefficient of static friction between the snow and the track of the snowmobile is 0.52. a. Draw a free body diagram and find the normal force of the snow on the snowmobile. b. Find the maximum net force up the slope from gravity and static friction with the track. c. Find the minimum time to complete the ride up the slope. d. Find the final velocity of the snowmobile at the top of the slope.arrow_forwardConsider the two-body system at the right. A 22.7-N block is placed upon an inclined plane which is inclined at a 17.2 degree angle. The block is attached by a string to a 34.5-N block which is suspended over a pulley. The coefficient of friction is 0.219. Determine the acceleration of the block and the tension in the string. PSYWarrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningUniversity Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning