COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 73QAP
To determine
External force needed to pull the dog with a constant velocity.
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A) A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed "v0".
The constant horizontal force applied by the woman:
has the same magnitude as the weight of the box.
is greater than the weight of the box.
has the same magnitude as the total force which resists the motion of the box.
is greater than the total force which resists the motion of the box.
is greater than either the weight of the box or the total force which resists its motion.
B) If the woman in the previous question doubles the constant horizontal force that she exerts on the box to push it on the same horizontal floor, the box then moves:
with a constant speed that is double the speed "v0" in the previous question.
with a constant speed that is greater than the speed "v0" in the previous question, but not necessarily twice as great.
for a while with a speed that is constant and greater than the speed "v0" in the previous question, then with a…
The custodians clean the field house gym floor between games at the annual Holiday Basketball Classic. Chuck exerts a force on a 1.1-kg push broom as he walks across the floor at a constant speed. The coefficient of friction between the floor and the broom is 0.45 and the broom handle makes an angle of 41° with the horizontal. Determine the amount of force with which Chuck pushes downward (along the handle of the broom) in order to achieve this constant speed motion. (Suggestion: Begin with a free body diagram.)
X
Figure 5-29
Three astronauts, propelled by jet backpacks, push and guide a 120 kg asteroid toward a processing dock,
exerting the forces shown in Figure 5-29, with F1 = 32 N, F2 = 54 N, F3 = 41 N, 01 = 30°, and 03 = 60°. What is
the asteroid's acceleration in unit-vector notation?
Chapter 5 Solutions
COLLEGE PHYSICS
Ch. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAPCh. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAP
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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
- Give 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_forwardThe uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us = 0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is us = 0.45. Assume the man exerts only a horizontal force on the crate 2.4 m 1.6 m -1.2 m-arrow_forward1 Figure 5-19 gives the free-body diagram for four situations in which an object is pulled by several forces across a frictionless floor, as seen from overhead. In which situations does the acceleration a of the object have (a) an x component and (b) a y component? (c) In each situation, give the direction of a by naming either a quadrant or a direction along an axis. (Don't reach for the calculator because this can be answered with a few mental calculat s.) A7N 46N 46 N 3 N 3 N 2NT 3 N 2 N 3 N 5 N 2 N 5 N 2NV 4N 5 N v4 N ,3N 4 N ,4N 5 N V4 N (1) (2) (3) (4)arrow_forward
- *49. ssm A person is trying to judge whether a picture (mass = 1.10 kg) is properly positioned by temporarily pressing it against a wall. The press- ing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.660. What is the minimum amount of pressing force that must be used?arrow_forward1. Consider the forces acting on these three changes and list in order of the magnitude of the force starting with the smallest. A --- r B -4 +q +q Find FA Find Fa Find Fe List in order of the magnitudearrow_forwardA crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? O It is least equal to the weight of the crate. O It is equal to n. O It is larger than the weight of the crate. O It is greater than the component of the gravitational force acting down the ramp. O It is equal to the component of the gravitational force acting down the ramp.arrow_forward
- 4) Cindy wants to move a 20 kg chair to a different spot in her living room. She puts slippery disks, "sofa sliders", under the feet of the chair and pushes the chair at a steady 0.4 m/s across the room. The slippery disks have a coefficient of kinetic friction 4 = 0.07. How much force does she apply to push the sofa across the room? 0.8 N 13.7 N 0.6 N 1.4 Narrow_forwardYou want to push a 7-kg box up a 15 ramp. The coefficient of kinetic friction between the ramp and the box is 0.30. With what magnitude force parallel to the ramp should you push on the box so that it moves up the ramp at a constant speed? Tkg 8-15° O 55.56 N O 37.67 N O 23.50 N 16.56 Narrow_forwardA 2N force acts on a 10N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force on the block? A)0N, B)2N, C) 5N, D)8N, E)10Narrow_forward
- PRINTER VERSION 4 ВАСК NEXT Z Your answer is partially correct. Try again. A 2.70 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 5.98 N and a vertical force P are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and u = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)10.0 N and (b)14.0 N. (The upward pull is insufficient to move the block vertically.) m em em (a) Number 5.9 Units em lem (b) Number T7.37 Units lem Click if you would like to Show Work for this question: Open Show Work lem plem SHOW HINT blem LINK TO TEXT LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE blem e here to search 7:12 PM ENG 4/4/2021 13) 17 pause break eno Pgup prt sc delete hon insert 115Pgdn %23 3 4 5. backspo 远arrow_forwardProblem 23 A man wants to accelerate a child on a sled. The combined mass of the child and the sled is 30.0 kg, and the coefficient of kinetic friction between the snow and the sled is 0.150. In case (1), the man applies a force of 200.0 Newtons at an angle of 30.0° below the horizontal. In case (2), he applies the same force at an angle of 30.0°above the horizontal. What is the acceleration of the sled in each case? (1) (2) 30°arrow_forwardEstimate the height of a typical playground slide and theangle its surface makes with the horizontal. A child wearing a different sort of clothing than the first child climbs the ladder to the top of the slide, sits on the slide, lets go of the handrail, and remains at rest. What is the minimum possible value for the coefficient of static friction between this child and the surface of the slide?arrow_forward
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