COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 9, Problem 50QAP
To determine
What will the new dimensions of the cube be after the forces are applied (
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Students have asked these similar questions
10N force is uniformly distributed over the surface of a sphere of radius 20cm. The force at each point acts inward along the normal at that point. Find the fractional change in volume if the compressibility of the sphere is 10-11m2/N.
a) 3*10-10
b) 1.5*10-11
c) 1.98*10-10
d) 2*10-11
10. Calculate the second moment of area for a 2 x 6 piece of lumber about the x-x and y-y
axes, as shown.
y
X
y
4. Certain frictional forces have magnitude proportional to the square
of the velocity of the moving object. Thus |Ffriction| = -yv² for some
positive constant y. Here there is an annoying sign issue since the
frictional force must have sign opposite to the velocity. One can write
Felastic = -y|v|v. If an object of mass m is subject to this frictional
force and no other forces, and the initial velocity is positive, then the
velocity will always be positive and we can just say Ffriction
Then the position y of the particle satisfies the equation
-yo?.
dy
dt2
2
dy
+y
dt
= 0.
Write out a solution of this equation for the initial conditions y(0) =
Yo, (dy/dt)(0)
the substitution u =
= vo. Hint: The equation reduces to first order. Use
dy/dt and solve the first order equation to get
u. Then integrate u to get y.
Chapter 9 Solutions
COLLEGE PHYSICS
Ch. 9 - Prob. 1QAPCh. 9 - Prob. 2QAPCh. 9 - Prob. 3QAPCh. 9 - Prob. 4QAPCh. 9 - Prob. 5QAPCh. 9 - Prob. 6QAPCh. 9 - Prob. 7QAPCh. 9 - Prob. 8QAPCh. 9 - Prob. 9QAPCh. 9 - Prob. 10QAP
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- What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time? Select one: a. The body will not come back to its original position O b. The body will come back to its original position c. The body will be unaffected. d. The body will become hot. e. The body will not feel stress.arrow_forward3 -6 m C The cylinder with a mass of 1000 Kg is supported as shown in the figure, determine the reaction at the hinge. 4 r 6m-arrow_forward7- Question 7. The following true stress-strain curve for a carbon nanofiber/epoxy with CaCO3 nanoparticles embedded in the matrix is represented in the figure bellow. Calculate the followings: a) K and n of stress-strain equation o=K ɛ". b) modulus of elasticity. c) toughness. 700 600 500 400 300 200 100 0.5 1 1.5 2 2.5 3 3.5 4 Strain % Stress (MPa)arrow_forward
- 12:10 4G Not Secure - yslphysics.weebly.com the rod. odulus for metal = 1.0 x 10!l N m²² ) 30 of 32 Answer: 3.2×10-4 J EXERCISE 2 A hollow cylinder has length 50.0 cm, internal diameter 5.0 cm and external diameter 6.0 cm. A force of magnitude 1.0 kN acts at each end of cylinder so that the cylinder is being compressed. Determine the compression of cylinder. ( Young's modulus for the material of the Cylinder = 7.0x101º Nm-² ) Answer: 8.3×10-6 m EXERCISE 3 A wire of length 0.50 m is fixed horizontally between two supports separated by 0.50 m. When a mass of 8.0 kg hangs from the middle of the wire, the mid-point sags by 1.00 cm. The diameter of the wire is 2.8 mm. Calculate the Young's modulus of the wire. (Given g = 9.81 m s-2) Answer: 1.99 × 10* Puarrow_forward1.)When two wires of identical dimensions are used to hang 25 kg weights, wire A is observed to stretch twice as much as wire B. From this observation, you can make the following conclusions about the Young’s moduli of these wires: a.) YA = 4YB b.) YA = 2YB c.) YA = YB d.) YA = YBarrow_forwardA wire is stretched to its breaking point by a 5000 N force. A longer wire made of the same material has the same diameter. Is the force that will stretch it right to its breaking point larger than, smaller than, or equal to 5000 N? Explain.arrow_forward
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