Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 5, Problem 11P
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Whether block
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A box placed on the three-piece-bar as shown in the figure. The bar is
supported from points A and B. Part I and Il of the bar has a mass of 0.25 kg, and the
third part has a mass of 0.5 kg. (L=3 m)
a) (25%)Draw the free body diagram.
b) (75%)Find the reaction forces at points A and B.
• 1/6 •
A
m,- m, » 0.25 kg
m- 0.5 kg
mox 2 kg
Using an everyday example, explain a situation where friction is detrimental. In your answer specify the type of friction involved and how it acts in a detrimental manner.
A 1.0kg box accelerates from rest in a straight line across a frictionless surface for 20 seconds as depicted in the force vs time graph in the attached image.
a) Find the time taken for the object to reach a speed of 5.0m/s
(Please include a clear explanation and steps for this because I asked this same question before and didn't understand it at all).
Chapter 5 Solutions
Physics for Scientists and Engineers
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- Two blocks are connected by a string, as shown in the figure (Figure 1). The smooth inclined surface makes an angle of 35° with the horizontal, and the block on the incline has a mass of 5.7 kg. The mass of the hanging block is m = 3.1 kg. Part A For the steps and strategies involved in solving a similar problem, you may view the following Example 6-13 video: Find the direction of the hanging block's acceleration. REASONING AND STRATEGY O Upward We will use Newton's second lw to ink the forces. maes, and accelerations F. - ma, F,-ma, O Downward Add up all forces in each direction that act on each objecer, using the free-body diagram as a guide Find the acceleration components, and then apply Newson's second law. N4 Submit Request Answer Er. Tma E. , -T-ma Part B Er, N-, -0 Find the magnitude of the hanging block's acceleration. Express your answer in meters per second squared. να ΑΣφ. a = m/s? Submit Request Answer Figure Provide Feedback 5.7 kg m 35°arrow_forwardPROBLEM I The 260kg crate shown in the figure rests on a horizontal surface for which the coefficient of kinetic friction is 025. If the crate is subjected to a 400 N towing force as shown determine the velocity of the crate in 5 s starting from rest PROBLEM 2 PROBLEM 3 The 80 kg block A shown in Figure is released from rest If the masses of the puleys and the cord are neglected determine the speed of the 12 kg block B in 3 s m₁ P = 400 N 6 = 30° 30⁰ SH Datum Consider the masses my 20 kg and m, 18 kg in the system represented by the figure bekow, If the coefficient of friction is OJ and the incination angle is 30°, find the acceleration of the system and the tension in the cord joining two mossCS m₂arrow_forwardThe block at point A is released from rest on a smooth track, which is one quadrant of a circle of radius 5m. It continues to move along a rough surface from point B to E and acquires a velocity of 8.6 m/s at point C. If its velocity at E is 2.25 m/s, calculate: a) velocity at B b) the coefficient of friction between the block and the surface B to E c) mass of the block, if the loss in KE between points D to C is 24.05 J d) velocity at D e) distance DEarrow_forward
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- ades - Colfege Physics I (F X Mail - Bishop Jr, Leslie- Outlook X W Chapter 4 Homewok i webassign.net/web/Student/Assignment-Responses/submit?dep3D25107699&tags=autosave%#Q6 Suppose the coefficient of static friction between a quarter and the back wall of a rocket car is 0.259. At what minimum rate (in m/s<) would the car have to accelerate so that a quarter placed on the back wall would remain in place?arrow_forwardMY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.880 m/s encounters a rough horizontal surface of length l = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.351 and he exerts a constant horizontal force of 293 N on the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction --Select--- (b) Find the net work done on the crate while it is on the rough surface. (c) Find the speed of the crate when it reaches the end of the rough surface. m/sarrow_forwardBlock B rests on an A wedge. When the system is released and block A and B Since the static friction coefficient between them is μs and the kinetic friction coefficient is μk;a) Find the acceleration of block B.b) Find the relative velocity of B with respect to A at t=0.5 seconds. NOTE=There is no friction between the wedge A and the surface.arrow_forward
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