EBK PHYSICS FOR SCIENTISTS AND ENGINEER
6th Edition
ISBN: 9781319321710
Author: Mosca
Publisher: VST
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 5, Problem 19P
To determine
To Compare: The magnitude of the resulting acceleration of the centre of mass of the two-puck system and the magnitude of acceleration of
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A person is pushing a fully loaded 28.90 kg wheelbarrow at
constant velocity along a plank that makes an angle
32.0° with the horizontal. The load is distributed such
that the center of mass of the wheelbarrow is exactly
halfway along its length L.
What is the magnitude of the total force F, the person must
apply so that the wheelbarrow is parallel to that plank? You
may neglect the radius of the wheel in your a
nalysis. The
gravitational acceleration is g = 9.81 m/s.
N.
Consider the woman doing push-ups in the figure. She has a mass of 51.3 kg,
CG
land the distance from her feet to her center of mass is 0.85 m, while the distance from her feet to her
hands is 1.7 m.
a
Freaction
b
Part (a) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a
constant speed.
Part (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.25 cm, and she exerts force on the floor at a horizontal
distance of 16 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle.
Part (c) How much work in joules does she do if her center of mass rises 0.21 m?
Part (d) What is her useful power output, in watts, if she does 25 pushups in one minute? For the sake of simplicity, ignore any power used by her
muscles lowering her body during each pushup.
Two blocks, with masses m and 3m, are attached to the ends of a string with negligible mass that passes over a pulley, as shown above. The pulley has negligible mass and friction and is attached to the ceiling by a bracket.The blocks are simultaneously released from rest.
The acceleration of the center of mass of the blocks-string-pulley system has magnitude aCOM . Briefly explain, in terms of any external forces acting on the system, why aCOM is less than g.
Chapter 5 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8PCh. 5 - Prob. 9PCh. 5 - Prob. 10P
Ch. 5 - Prob. 11PCh. 5 - Prob. 12PCh. 5 - Prob. 13PCh. 5 - Prob. 14PCh. 5 - Prob. 15PCh. 5 - Prob. 16PCh. 5 - Prob. 17PCh. 5 - Prob. 18PCh. 5 - Prob. 19PCh. 5 - Prob. 20PCh. 5 - Prob. 21PCh. 5 - Prob. 22PCh. 5 - Prob. 23PCh. 5 - Prob. 24PCh. 5 - Prob. 25PCh. 5 - Prob. 26PCh. 5 - Prob. 27PCh. 5 - Prob. 28PCh. 5 - Prob. 29PCh. 5 - Prob. 30PCh. 5 - Prob. 31PCh. 5 - Prob. 32PCh. 5 - Prob. 33PCh. 5 - Prob. 34PCh. 5 - Prob. 35PCh. 5 - Prob. 36PCh. 5 - Prob. 37PCh. 5 - Prob. 38PCh. 5 - Prob. 39PCh. 5 - Prob. 40PCh. 5 - Prob. 41PCh. 5 - Prob. 42PCh. 5 - Prob. 43PCh. 5 - Prob. 44PCh. 5 - Prob. 45PCh. 5 - Prob. 46PCh. 5 - Prob. 47PCh. 5 - Prob. 48PCh. 5 - Prob. 49PCh. 5 - Prob. 50PCh. 5 - Prob. 51PCh. 5 - Prob. 52PCh. 5 - Prob. 53PCh. 5 - Prob. 54PCh. 5 - Prob. 55PCh. 5 - Prob. 56PCh. 5 - Prob. 57PCh. 5 - Prob. 58PCh. 5 - Prob. 59PCh. 5 - Prob. 60PCh. 5 - Prob. 61PCh. 5 - Prob. 62PCh. 5 - Prob. 63PCh. 5 - Prob. 65PCh. 5 - Prob. 67PCh. 5 - Prob. 68PCh. 5 - Prob. 69PCh. 5 - Prob. 70PCh. 5 - Prob. 71PCh. 5 - Prob. 72PCh. 5 - Prob. 73PCh. 5 - Prob. 74PCh. 5 - Prob. 75PCh. 5 - Prob. 76PCh. 5 - Prob. 77PCh. 5 - Prob. 78PCh. 5 - Prob. 79PCh. 5 - Prob. 80PCh. 5 - Prob. 82PCh. 5 - Prob. 83PCh. 5 - Prob. 84PCh. 5 - Prob. 85PCh. 5 - Prob. 86PCh. 5 - Prob. 87PCh. 5 - Prob. 88PCh. 5 - Prob. 89PCh. 5 - Prob. 90PCh. 5 - Prob. 91PCh. 5 - Prob. 92PCh. 5 - Prob. 93PCh. 5 - Prob. 94PCh. 5 - Prob. 95PCh. 5 - Prob. 96PCh. 5 - Prob. 97PCh. 5 - Prob. 101PCh. 5 - Prob. 102PCh. 5 - Prob. 103PCh. 5 - Prob. 104PCh. 5 - Prob. 105PCh. 5 - Prob. 106PCh. 5 - Prob. 107PCh. 5 - Prob. 108PCh. 5 - Prob. 109PCh. 5 - Prob. 110PCh. 5 - Prob. 111PCh. 5 - Prob. 112PCh. 5 - Prob. 113PCh. 5 - Prob. 114PCh. 5 - Prob. 115PCh. 5 - Prob. 116PCh. 5 - Prob. 117PCh. 5 - Prob. 118PCh. 5 - Prob. 119PCh. 5 - Prob. 120PCh. 5 - Prob. 121PCh. 5 - Prob. 122PCh. 5 - Prob. 123PCh. 5 - Prob. 124PCh. 5 - Prob. 125PCh. 5 - Prob. 126PCh. 5 - Prob. 127PCh. 5 - Prob. 128PCh. 5 - Prob. 129PCh. 5 - Prob. 130PCh. 5 - Prob. 131PCh. 5 - Prob. 132PCh. 5 - Prob. 133PCh. 5 - Prob. 134PCh. 5 - Prob. 135PCh. 5 - Prob. 136PCh. 5 - Prob. 137PCh. 5 - Prob. 138PCh. 5 - Prob. 139P
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
- the driver of a car on a horizontal road makesan emergency stop by applying the brakes so that all four wheelslock and skid along the road.The coefficient of kinetic friction betweentires and road is 0.40.The separation between the front andrear axles is L = 4.2 m, and the center of mass of the car is locatedat distance d =1.8 m behind the front axle and distance h = 0.75 mabove the road. The car weighs 11 kN. Find the magnitude of (a)the braking acceleration of the car, (b) the normal force on eachrear wheel, (c) the normal force on each front wheel, (d) the brakingforce on each rear wheel, and (e) the braking force on eachfront wheel. (Hint: Although the car is not in translational equilibrium,it is in rotational equilibrium.)arrow_forward0.6 m At Grattan Raceway there is a sharp hill known as the "Jump."Ifyou go about 39 m/s (87 mi/hr), your tires will just lose contact with the road. The instantaneous ra dius of curvature ofthe hill is e, and the center of mass is 0.6 mabove the road surface. a) Considering the vehicle as a particle, and assumingno aerodynamic forces, draw a free-body diagram for the vehicle when it is exactly at the top of the hill. (a b) Calculate the instantaneous ra dius of curvature pat thatpoint. c) Ifyouneeded to brake at this point, what would be your maximumnegative tangential acceleration rate? Assume that your tires have a coefficient of friction u-1.10 with the track.arrow_forwardConsider a method for measuring the mass of a person’s arm in anatomical studies. The subject lies on her back, extends her relaxed arm to the side and two scales are placed below the arm. One is placed under the elbow and the other under the back of her hand. Construct a problem in which you calculate the mass of the arm and find its center of mass based on the scale readings and the distances of the scales from the shoulder joint. You must include a free body diagram of the arm to direct the analysis. Consider changing the position of the scale under the hand to provide more information, if needed. You may wish to consult references to obtain reasonable mass values.arrow_forward
- A truck with a mass m7 is used to move load on a construction site. At the shown instant, the truck is moving during unloading process. The both front and rare wheels A and B are always slipping. The mass of driver and the wheels are neglected and the coefficient of kinetic friction between the wheels and ground P, determine (i) the acceleration of the truck and (ii) the reaction at wheels A and B. Note that the centre of mass for the truck is G7, and the centre of mass for the load is G, . Use the following details: m,= 4.3 Tonnes, Hx = 0.38, m = 3.3 Tonnes, L, = 2.09m, L2= 1.96m, L3= 0.20m, L4= 3.41m, L5= 0.64m. GLO GT l2 B dows buiA i انتقل إلى الإعدا 15 14arrow_forwardThe center of mass of the arm shown in the figure is at point A. Find the magnitudes (in N) of the tension force Ft and the force Fs which hold the arm in equilibrium. (Let θ = 22.0°.) Assume the weight of the arm is 42.9 N.arrow_forwardMichael Jordan won the 1987 NBA SlamDunk Contest. While doing a slam dunk in thelocal motion capture lab, an average verticalground reaction force of 2900 N (Normal Force) acted on Jordan's take off foot for 0.21s during the upward phase of his slam dunk jump. a) What would his take-off velocity off the ground be if his mass was 95 kgb) If Jordan's center of gravity (COG) was 1.3 meters above the ground when his foot came off the ground, what is the maximum height his CoG reaches during the jump.arrow_forward
- A 1Zero Suit Samuskg object is located at a distance of 6.4 x106 m from the center of a larger object whose mass is 6.0 x 1024 kg. What is the size of the force acting on the smaller object?arrow_forwardA 500 gram meter stick has a center of mass at the 50 cm mark. Using two fingers, one at the 10 cm mark and the other at the 20 cm mark, you hold the meter stick in a horizontal, stationary position. Find the forces your fingers place on the meter stick.arrow_forwardWith FBD Solution and Formulaarrow_forward
- A nucleus that captures a stray neutron must bring the neutronto a stop within the diameter of the nucleus by means of thestrong force. That force, which “glues” the nucleus together, is approximatelyzero outside the nucleus. Suppose that a stray neutronwith an initial speed of 1.4 * 107 m/s is just barely captured by anucleus with diameter d = 1.0 * 10-14 m. Assuming the strongforce on the neutron is constant, find the magnitude of that force.The neutron’s mass is 1.67 * 10-27 kg.arrow_forwardJ 6arrow_forwardThe center of mass G of a high jumper follows the trajectory shown. Determine the component vo, measured in the vertical plane of the figure, of his takeoff velocity and angle 0 if the apex of the trajectory just clears the bar at A. (In general, must the mass center G of the jumper clear the bar during a successful jump?) Assume a = 3.4 ft, b = 4.0 ft, c = 3.0 ft. Answers: Vo = 0 = i 10 ft/secarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
28.1 Rigid Bodies; Author: MIT OpenCourseWare;https://www.youtube.com/watch?v=u_LAfG5uIpY;License: Standard YouTube License, CC-BY