A 3.0-kg box is held at rest against a vertical wall by a pushing force from my hand. Use g = 10 m/s². Match the anwers with questions. (Hint: Draw a proper free-body diagram.) 120 N3 kg ◆ What is the magnitude and direction of the weight force on the box from the earth? ◆ What is the magnitude and direction of the pushing force on the box from the hand? What is the magnitude and direction of the normal force on the box from the wall? What is the magnitude and direction of the friction force on the box from the wall? ◆ What is the net force on the box? A. 120 N, down B. 30 N, to the left C. zero, therefore no direction D. 30 N, down E. 120 N, to the left F. 30 N, up G. 120 N, up H. 120 N, to the right I. none of the given 30 N. to the right

A 3.0-kg box is held at rest against a vertical wall by a pushing force from my hand. Use g = 10 m/s². Match the anwers with questions. (Hint: Draw a proper free-body diagram.) 120 N3 kg ◆ What is the magnitude and direction of the weight force on the box from the earth? ◆ What is the magnitude and direction of the pushing force on the box from the hand? What is the magnitude and direction of the normal force on the box from the wall? What is the magnitude and direction of the friction force on the box from the wall? ◆ What is the net force on the box? A. 120 N, down B. 30 N, to the left C. zero, therefore no direction D. 30 N, down E. 120 N, to the left F. 30 N, up G. 120 N, up H. 120 N, to the right I. none of the given 30 N. to the right

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....

See similar textbooks

Similar questions

Consider the baby being weighed in the following figure. (a) What is the mass of the infant and basket if a scale reading of 55 N is observed? (b) What is tension T1in the cord attaching the baby to the scale? (c) What is tension T2, In the cord attaching the scale to the ceiling, If the scale has a mass of 0.500 kg? (d) Sketch the situation, indicating the system of interest used to solve each part. The masses of the cords are negligible.
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?
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) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee? (b) During strenuous exercise, it is possible to exert forces to the joints that are easily 10 times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pam.
A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8m/s2 ? (c) What does the scale read if the elevator moves upward at constant velocity? (d) If the elevator had no brakes and the cable supporting it were to break loose so that the elevator could fall freely, what would the spring scale read?
A stubborn dog is being walked on a leash by its owner. At one point, the dog encounters an interesting scent at some spot on the ground and wants to explore It in detail, but the owner gets impatient and pulls on the leash with force along the leash. (a) What is the magnitude of the pulling force? (b) What angle does the leash make with the vertical?
A person doing a chin-up weighs 700 N, exclusive of the arms. During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from rest, what is the persons velocity at that point?
Santa Clause is about to distribute his gifts, but his reindeer Rudolph is still sleepy. So, instead of flying they use the ground and cross a 20-m-long bridge. Starting from rest, Rudolph pulls Santa and his sleigh, with a force F 30° above the horizontal against a frictional force of 80N. 1. Draw an appropriate free body diagram to represent all the forces acting on Santa and his sleigh. 2. Suppose the combined mass of Santa, his sleigh, and his gifts is 500kg. What is the magnitude of Fif the acceleration of Santa and his sleigh is 1.5 meters per second squared? 3. How much work is done by Rudolph in pulling Santa and his sleigh in crossing the bridge? 4. What is the change in the kinetic energy of Santa and his sleigh after crossing the bridge? 5. How fast are they moving at the end of the bridge?
Boxes A and B are in contact on a horizont a), frictionless surface. Box A has mass 20.0 kg and box B has mass 7.0 kg. A horizontal force of 250N is exerted on box A. (1.) Draw the free - body diagram tor each box (2.) What is the magnitude of the force that boA A exerts on box B? B. 250 N V.
A 392-N force parallel to the plane is required to support a body on an inclined plane of height 300 m and base 400 m. If the force exerted by the plane on theb body is 780N, a. what is the weight of the body? b. what is the frictional force between the body and the plane?
Two blocksmịand m2 connected by a rope are being pulled by a horizontalforce F equal 160 N. Suppose that mį=10 kg,20 kg, and the coefficient of kineticm 2 =20 kg10 kgfriction between each block and the surfacem1is 0.52.A. Draw free-body diagrams of both objects.B. Find the acceleration of the systemC. Find the tension in the ropeD. What is the distance that the system ( two masses) will travel if youknow that are started from rest and final velocity is 4.5 m/sec(B) a= { F
The net external force on the 25.5kg mower is 48.0N. If the force of friction is 22.5N. a. What force F in newtons is the person exerting on the mower? b.Suppose the mower is moving 1.10 m/s when the force F is removed. How fat will the mower go before stopping?