College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4, Problem 31PE
Two children pull a third child on a snow saucer sled exerting forces F1 and F2 as shown from above in Figure 4.36. Find the acceleration of the 49.00-kg sled and child system. Note that the direction of the frictional force is unspecified; it will be in the opposite direction of the sum of F1 and F2.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A man doing push-ups pauses in the position shown in the figure. His mass is m=72.0kg.
1. Draw a free body diagram of the man.
2. Determine the normal force exerted by the floor on each hand and on each foot (assume that the forces on the hands are evenly distributed, and the same is true for the forceson the feet).
A block of mass ?=2.80 kg is being pulled by a force ?⃗of magnitude 12.0 N on a horizontal, smooth (frictionless) surface. The force makes an angle ?=30.0° abovethe horizontal, as shown in the figure.
1. Find the magnitude of the normal force exerted by the surface on block.
2. Find the acceleration of the box.
3. If the box starts from rest, what would be its speed after it travels 2.00 m?
Two children pull a third child on a snow saucer sled exerting forces F1 and F2 as shown from above in the figure.
Find the acceleration (magnitude in m/s2 and direction in degrees counterclockswise from the axis directed to the right) of the 11.00 kg sled. Note that the direction of the frictional force is unspecified; it will be in the opposite direction of the sum of F1 and F2.
Chapter 4 Solutions
College Physics
Ch. 4 - Propose a force standard different from the...Ch. 4 - What properties do forces have that allow us to...Ch. 4 - How are inertia and mass related?Ch. 4 - What is the relationship between weight and mass?...Ch. 4 - Which statement is correct? (a) Net force causes...Ch. 4 - Why can we neglect forces such as those holding a...Ch. 4 - Explain how the choice of the “Stem of interest”...Ch. 4 - Describe a situation in which the net external...Ch. 4 - A system can have a nonzero velocity while the net...Ch. 4 - A rock is thrown straight up. What is the net...
Ch. 4 - (a) Give an example of different net external...Ch. 4 - If the acceleration of a system is zero, are no...Ch. 4 - If a constant, nonzero force is applied to an...Ch. 4 - The gravitational force on the basketball in...Ch. 4 - When you take off in a jet aircraft, there is a...Ch. 4 - A device used since the 1940s to measure the kick...Ch. 4 - Describe a Situation in which one a force on and,...Ch. 4 - Why does an ordinary rifle recoil (kick backward)...Ch. 4 - An American football lineman reasons that it is...Ch. 4 - Newton's third law of motion tells us that forces...Ch. 4 - If a leg is suspended by a traction setup as shown...Ch. 4 - Ina traction setup a broken bone, with pulleys and...Ch. 4 - To simulate the apparent weightlessness of space...Ch. 4 - A cartoon shows the toupee coming off the head of...Ch. 4 - Explain, in terms of the properties of the four...Ch. 4 - What is the dominant force between astronomical...Ch. 4 - Give a detailed example of the exchange of a...Ch. 4 - A 63.0-kg sprinter starts a race with an...Ch. 4 - If the sprinter from the previous problem...Ch. 4 - A cleaner pushes a 4.50-kg laundry cart in such a...Ch. 4 - Since astronauts in orbit are apparently...Ch. 4 - In Figure 4.7, the net external force on the 24-kg...Ch. 4 - The same rocket sled drawn in Figure 4.31 is...Ch. 4 - (a) If the rocket sled shown in Figure 4.32 starts...Ch. 4 - What is the deceleration of the rocket sled if it...Ch. 4 - Suppose two children push horizontally, but in...Ch. 4 - A powerful motorcycle can produce an acceleration...Ch. 4 - The rocket sled shown in Figure 4.33 accelerates...Ch. 4 - Repeat the previous problem for the situation in...Ch. 4 - The weight of an astronaut plus his space suit on...Ch. 4 - Suppose the mass of a fully loaded module in which...Ch. 4 - What net external force is exerted on a 1100-kg...Ch. 4 - A brave but inadequate rugby player is being...Ch. 4 - Two teams of nine members each engage in a tug of...Ch. 4 - What force does a trampoline have to apply to a...Ch. 4 - (a) Calculate the tension in a vertical strand of...Ch. 4 - Suppose a 60.0-kg gymnast climbs a rope. (a) What...Ch. 4 - Show that, as stated in the text, a force F...Ch. 4 - Consider the baby being weighed in Figure 4.34....Ch. 4 - A 5.00105 -kg rocket is accelerating straight up....Ch. 4 - The wheels of a midsize car exert a force of 2100...Ch. 4 - Calculate the force a 70.0-kg high jumper must...Ch. 4 - When landing after a spectacular somersault, a...Ch. 4 - A freight train consists of two 8.00104 -kg...Ch. 4 - Commercial airplanes are sometimes pushed out of...Ch. 4 - A 1100-kg car pulls a boat on a trailer. (a) What...Ch. 4 - (a) Find the magnitudes of the forces F1 and F2...Ch. 4 - Two children pull a third child on a snow saucer...Ch. 4 - Suppose your car was mired deeply in the mud and...Ch. 4 - What force is exerted on the tooth in Figure 4.38...Ch. 4 - Figure 4.39 shows Superhero and Trusty Sidekick...Ch. 4 - A nurse pushes a cart by exerting a force on the...Ch. 4 - Construct Your Own Problem Consider the tension in...Ch. 4 - Construct Your Own Problem Consider people pushing...Ch. 4 - Unreasonable Results (a) Repeat Exercise 4.29, but...Ch. 4 -
Ch. 4 - A flea jumps by exerting a force of 1.20105 N...Ch. 4 - Two muscles in the back of the leg pull upward on...Ch. 4 - A 76.0-kg person is being pulled away from a...Ch. 4 - Integrated Concepts A 35.0-kg dolphin decelerates...Ch. 4 - Integrated Concepts When starting a foot race, a...Ch. 4 - Integrated Concepts A large rocket has a mass of...Ch. 4 - Integrated Concepts A basketball player jumps...Ch. 4 - Integrated Concepts A 2.50-kg fireworks shell is...Ch. 4 - Integrated Concepts Repeat Exercise 4.47 for a...Ch. 4 - Integrated Concepts An elevator filled with...Ch. 4 - Unreasonable Results (a) What is the final...Ch. 4 - Unreasonable Results A 75.0-kg man stands on a...Ch. 4 - (a) What is the strength of the weak nuclear force...Ch. 4 - (a) What is the ratio of the strength of the...Ch. 4 - What is the ratio of the strength of the strong...
Additional Science Textbook Solutions
Find more solutions based on key concepts
66. Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 30 s to...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
3. Suppose the door of a room makes an airtight, but frictionless, fit in its frame. Do you think you could ope...
College Physics (10th Edition)
The proton is a composite particle composed of three quarks, all of which are either up quarks (u; charge +23e)...
Essential University Physics: Volume 2 (3rd Edition)
A projectile of mass 2.0 kg is fired in the air at an angle of 40.0 to the horizon at a speed of 50.0 m/s. At t...
University Physics Volume 1
17. (I) An automobile engine slows down from 3500 rpm to 1200 rpm in 2.5 s. Calculate (a) its angular accelerat...
Physics: Principles with Applications
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A block of mass ?=2.80 kg is being pulled by a force ?⃗ of magnitude 12.0 N on a horizontal, smooth (frictionless) surface. The force makes an angle ?=30.0° abovethe horizontal, as shown in the figure. a)Find the magnitude of the normal force exerted by the surface on block. b)Find the acceleration of the box. c)If the box starts from rest, what would be its speed after it travels 2.00 m?arrow_forwardTwo children pull a third child on a snow saucer sled exerting forces F1 and F2 as shown above in the figure. Find the acceleration a and direction θ of the 42-kg sled and child system. Note that the direction of the frictional force f is unspecified; it will be in the opposite direction of the sum of F1 and F2.arrow_forwardTwo masses, m1 and m2 are connected by a frictionless pulley and a massless string (idealpulley system). One mass, m1 sits on a 25o incline that is also frictionless, the other mass issuspended in air, as shown in figure 2. The mass on the incline (m1) has a mass of 5kg. Bothmasses are at rest.a) Draw a free-body diagram for both masses.b) What is the value of m2?arrow_forward
- Consider the scenario in the figure below. Suppose m1 = 4.5 kg, m2 = 6.5 kg. Thecoefficient of kinetic friction between block 2 and the ramp 0.54. The system is set intomotion so that block 2 is sliding down the ramp.a) What is the magnitude of the acceleration of the blocks?b) What is the tension in the string?arrow_forwardProblem Two-block system is given below. The mass of block one is m, = 4 kg and the mass of block two is m = 8 kg. A force is applied on m2 to start the motion of block two knowing that block 1 doesn't move. The coefficient of static friction for all surfaces is qiven as 0.4 (Take g-9.8 m/s). Tension force Fapplied a) Choose the correct answer tor the following question How many torces along the x-axis are acting on block I with mass m? How many forces along the y-axis are acting on block I with mans m? How many forces along the x-axis are acting on block 2 with mass m7 How many torces along the y axis are acting on block 2 with mass m? b) Calculate the magnitade of normal force | FNIlexerted by block 2 on block 1 Caleulate the magnitude of the muxinans atatic tnetien force (Falaated berween banck I anst hiloek 2arrow_forwardDiscussion #4: Net Force Solve the problem below. Show your complete and detailed solutions. The following four forces act on a 4.00 kg object: J É1 = 300N east F, = 700 N north %3D F3 500 N west FA= 600 N south a. Calculate the net force acting on the object. b. What is the acceleration of the object? Search entries or author Unreadarrow_forward
- An object of mass 10 kg is pulled up a rough (friction) inclined plane by a rope. The inclined plane has an angle e = 25.. If the tension in the rope is 100 N and %3D the object accelerates up the incline with a = 3m/s2, what is the coefficient of ki- netic friction? Start with a free body diagram. Write Newton's laws and plug in.arrow_forwardConsider the figure shown below. You are lowering two boxes,one on top of the other, down a ramp by pulling on a rope parallel to thesurface of the ramp. Both blocks move with a constant velocity of 15.0 [ m s]. The coefficient of kinetic friction between the ramp and the lower boxare 0.444 and the coefficient of static friction between the two boxes is0.800. a. Draw the Free-Body diagram of both blocks. Set the x-axis parallel tothe ramp. b. What are the magnitude and direction of the frictional force on the upper box? c. What is the magnitude of the applied force?arrow_forwardConsider the figure shown below. You are lowering two boxes,one on top of the other, down a ramp by pulling on a rope parallel to thesurface of the ramp. Both blocks move with a constant velocity of 15.0 [ m s]. The coefficient of kinetic friction between the ramp and the lower boxare 0.444 and the coefficient of static friction between the two boxes is0.800. a. Draw the Free-Body diagram of both blocks. Set the x-axis parallel tothe ramp. b. What are the magnitude and direction of the frictional force on the upper box? c. What is the magnitude of the applied force? d. Determine the angle at which the top block will start to slide downthe bottom block. Answer letter D ONLY plsarrow_forward
- The two blocks are connected by a massless uniform rope. An upward force of 150 N is applied as shown in the figure below. (a) Draw three free-body diagrams: one for the 6.00-kg block, and another one for the 5.00-kg block. For each force, indicate what body exerts that force. b) What is the acceleration of the 5.00-kg block? c) What is the tension at the top of the 5.00-kg block?arrow_forwardA woman at an airport is towing her 20.0 kg suitcase with an acceleration of 0.500 m/s2 by pulling on the suitcase with force P (40.0 N) at an angle 30.0oabove the horizontal. Find the following: (use g=10.0 m/s2) a) Draw a free-body-diagram of the suitcase.b) What is the friction force on the suitcase by the ground?c) What is the normal force exerted on the suitcase by the ground?arrow_forwardThe rocket sled accelerates at a rate of 40.0 m/s^2 Its passenger has a mass of 68.5 kg. a. Calculate the horizontal component of the force the seat exerts agaisnt his body. b. Compare this with his weight using a ratio, the horizontal component of the force is how many times his weight c. Calculate the magnitude and direction of the total force the seat exerts against his bodyarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY