a) To determine The acceleration of the punch when θ = 0 . Explanation Write the equation for the harmonic motion of the pivoted sector. θ = θ 0 sin 2 π t (I) Here, amplitude is θ 0 and time is t . Substitute π 12 rad for θ 0 in Equation (I). θ = ( π 12 rad ) sin 2 π t = π 12 sin 2 π t (II) Differentiate Equation (II) with respect to time. d d t ( θ ) = d d t ( π 12 sin 2 π t ) θ ˙ = π 2 6 cos 2 π t (III) Here, angular velocity is θ ˙ . Differentiate Equation (III) with respect to time. d d t ( θ ˙ ) = d d t ( π 2 6 cos 2 π t ) θ ¨ = − π 3 3 sin 2 π t (IV) Here, angular acceleration is θ ¨ . Draw the schematic diagram of the system as shown in Figure (I). For Figure (I), apply law of cosine rule. l 2 = y 2 + b 2 − 2 y b cos θ (V) Here, distance between points A and B is l , distance between points O and A is y and distance between points O and B is b . Differentiate Equation (V) with respect to time. d d t ( l 2 ) = d d t ( y 2 + b 2 − 2 y b cos θ ) 0 = y y ˙ − y ˙ b cos θ + y b θ ˙ sin θ (VI) Here, velocity of the punch is y ˙ . Differentiate Equation (VI) with respect to time. 0 = d d t ( y y ˙ − y ˙ b cos θ + y b θ ˙ sin θ ) 0 = y ¨ ( y − b cos θ ) + y ˙ 2 + 2 b y ˙ θ ˙ sin θ + b y θ ˙ 2 cos θ + b y θ ¨ sin θ (VII) Here, acceleration of the punch is y ¨ . Conclusion: Substitute 0 for θ in Equation (II). 0 = π 12 sin 2 π t 0 = sin 2 π t sin π = sin 2 π t π = 2 π t t = 1 2 Substitute 1 2 for t in Equation (III). θ ˙ = π 2 6 cos 2 π ( 1 2 ) = − π 2 6 Substitute 1 2 for t in Equation (IVI) b) To determine The acceleration of the punch when θ = π 12 .

8th Edition

ISBN: 9781119047315

Author: Bolton

Publisher: VST

See similar textbooks

Concept explainers

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be create…

Videos

Question

Chapter 5.3, Problem 58P

To determine

The acceleration of the punch when θ=0.

To determine

The acceleration of the punch when θ=π12.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 5.3, Problem 57P

Chapter 5.4, Problem 59P

Students have asked these similar questions

CORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE THANK YOU. CORRECT ANSWER IS ALREADY PROVIDED. I REALLY NEED FBD. The cantilevered spandrel beam shown whose depth tapers from d1 to d2, has a constant width of 120mm. It carries a triangularly distributed end reaction.Given: d1 = 600 mm, d2 = 120 mm, L = 1 m, w = 100 kN/m1. Calculate the maximum flexural stress at the support, in kN-m.2. Determine the distance (m), from the free end, of the section with maximum flexural stress.3. Determine the maximum flexural stress in the beam, in MPa.ANSWERS: (1) 4.630 MPa; (2) 905.8688 m; (3) 4.65 MPa

CORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE THANK YOU. CORRECT ANSWER IS ALREADY PROVIDED. I REALLY NEED FBD A concrete wall retains water as shown. Assume that the wall is fixed at the base. Given: H = 3 m, t = 0.5m, Concrete unit weight = 23 kN/m3Unit weight of water = 9.81 kN/m3(Hint: The pressure of water is linearly increasing from the surface to the bottom with intensity 9.81d.)1. Find the maximum compressive stress (MPa) at the base of the wall if the water reaches the top.2. If the maximum compressive stress at the base of the wall is not to exceed 0.40 MPa, what is the maximum allowable depth(m) of the water?3. If the tensile stress at the base is zero, what is the maximum allowable depth (m) of the water?ANSWERS: (1) 1.13 MPa, (2) 2.0 m, (3) 1.20 m

CORRECT AND DETAILED SOLUTION WITH FBD ONLY. I WILL UPVOTE THANK YOU. CORRECT ANSWER IS ALREADY PROVIDED. I NEED FBD A short plate is attached to the center of the shaft as shown. The bottom of the shaft is fixed to the ground.Given: a = 75 mm, h = 125 mm, D = 38 mmP1 = 24 kN, P2 = 28 kN1. Calculate the maximum torsional stress in the shaft, in MPa.2. Calculate the maximum flexural stress in the shaft, in MPa.3. Calculate the maximum horizontal shear stress in the shaft, in MPa.ANSWERS: (1) 167.07 MPa; (2) 679.77 MPa; (3) 28.22 MPa

Chapter 5 Solutions

EBK ENGINEERING MECHANICS: DYNAMICS, SI

Ch. 5.2 - Prob. 1P Ch. 5.2 - The circular sector rotates about a fixed axis...Ch. 5.2 - Prob. 3P Ch. 5.2 - Prob. 4P Ch. 5.2 - When switched on, the grinding machine accelerates...Ch. 5.2 - The small cart is released from rest in position 1...Ch. 5.2 - The flywheel has a diameter of 600 mm and rotates...Ch. 5.2 - Prob. 8P Ch. 5.2 - Prob. 9P Ch. 5.2 - The angular acceleration of a body which is...

Ch. 5.2 - The device shown rotates about the fixed z-axis...Ch. 5.2 - Prob. 12P Ch. 5.2 - The T-shaped body rotates about a horizontal axis...Ch. 5.2 - Prob. 14P Ch. 5.2 - Prob. 15P Ch. 5.2 - Prob. 16P Ch. 5.2 - The bent flat bar rotates about a fixed axis...Ch. 5.2 - At time t = 0, the arm is rotating about the fixed...Ch. 5.2 - A variable torque is applied to a rotating wheel...Ch. 5.2 - Prob. 20P Ch. 5.2 - Prob. 21P Ch. 5.2 - Prob. 22P Ch. 5.2 - Prob. 23P Ch. 5.2 - Prob. 24P Ch. 5.2 - Prob. 25P Ch. 5.2 - During its final spin cycle, a front-loading...Ch. 5.2 - Prob. 27P Ch. 5.2 - Prob. 28P Ch. 5.3 - Slider A moves in the horizontal slot with a...Ch. 5.3 - The fixed hydraulic cylinder C imparts a constant...Ch. 5.3 - Prob. 31P Ch. 5.3 - At the instant under consideration, the hydraulic...Ch. 5.3 - The hydraulic cylinder D is causing the distance...Ch. 5.3 - The Scotch-yoke mechanism converts rotational...Ch. 5.3 - Prob. 35P Ch. 5.3 - The wheel of radius r rolls without slipping, and...Ch. 5.3 - Link OA rotates with a clockwise angular velocity...Ch. 5.3 - Determine the acceleration of the shaft B for θ =...Ch. 5.3 - Prob. 39P Ch. 5.3 - Prob. 40P Ch. 5.3 - Boom OA is being elevated by the rope-and-pulley...Ch. 5.3 - The hydraulic cylinder imparts a constant upward...Ch. 5.3 - Prob. 43P Ch. 5.3 - The rod OB slides through the collar pivoted to...Ch. 5.3 - Prob. 45P Ch. 5.3 - Prob. 46P Ch. 5.3 - Link OA is given a clockwise angular velocity ω =...Ch. 5.3 - Prob. 48P Ch. 5.3 - Derive an expression for the upward velocity v of...Ch. 5.3 - Prob. 50P Ch. 5.3 - Show that the expressions v = rω and at = rα hold...Ch. 5.3 - Prob. 52P Ch. 5.3 - Prob. 53P Ch. 5.3 - Prob. 54P Ch. 5.3 - Prob. 55P Ch. 5.3 - Prob. 56P Ch. 5.3 - Prob. 57P Ch. 5.3 - The punch is operated by a simple harmonic...Ch. 5.4 - The right-angle link AB has a clockwise angular...Ch. 5.4 - The uniform rectangular plate moves on the...Ch. 5.4 - The cart has a velocity of 4 ft/sec to the right....Ch. 5.4 - Prob. 62P Ch. 5.4 - The speed of the center of the earth as it orbits...Ch. 5.4 - Prob. 64P Ch. 5.4 - The circular disk of radius 8 in. is released very...Ch. 5.4 - For a short interval, collars A and B are sliding...Ch. 5.4 - Prob. 67P Ch. 5.4 - The magnitude of the absolute velocity of point A...Ch. 5.4 - Prob. 69P Ch. 5.4 - Prob. 70P Ch. 5.4 - Determine the angular velocity of bar AB just...Ch. 5.4 - For the instant represented, point B crosses the...Ch. 5.4 - Prob. 73P Ch. 5.4 - For a short interval, collars A and B are sliding...Ch. 5.4 - Determine the angular velocity of link BC for the...Ch. 5.4 - The elements of a switching device are shown. If...Ch. 5.4 - Determine the angular velocity ωAB of link AB and...Ch. 5.4 - Determine the angular velocity ωAB of link AB and...Ch. 5.4 - The rotation of the gear is controlled by the...Ch. 5.4 - Prob. 80P Ch. 5.4 - Prob. 81P Ch. 5.4 - The ends of the 0.4-m slender bar remain in...Ch. 5.4 - Prob. 83P Ch. 5.4 - Prob. 84P Ch. 5.4 - Pin P on the end of the horizontal rod slides...Ch. 5.4 - A four-bar linkage is shown in the figure (the...Ch. 5.4 - The mechanism is part of a latching device where...Ch. 5.4 - The elements of the mechanism for deployment of a...Ch. 5.4 - Prob. 89P Ch. 5.4 - Prob. 90P Ch. 5.5 - The slender bar is moving in general plane motion...Ch. 5.5 - Prob. 92P Ch. 5.5 - Prob. 93P Ch. 5.5 - Roller B of the quarter-circular link has a...Ch. 5.5 - Prob. 95P Ch. 5.5 - Prob. 96P Ch. 5.5 - Prob. 97P Ch. 5.5 - At a certain instant vertex B of the...Ch. 5.5 - Prob. 99P Ch. 5.5 - Prob. 100P Ch. 5.5 - The mechanism of Prob. 5/100 is now shown in a...Ch. 5.5 - Prob. 102P Ch. 5.5 - Prob. 103P Ch. 5.5 - The switching device of Prob. 5/76 is repeated...Ch. 5.5 - The shaft of the wheel unit rolls without slipping...Ch. 5.5 - Prob. 106P Ch. 5.5 - The attached wheels roll without slipping on the...Ch. 5.5 - The mechanism of Prob. 5/77 is repeated here. By...Ch. 5.5 - Prob. 109P Ch. 5.5 - Prob. 110P Ch. 5.5 - Prob. 111P Ch. 5.5 - Prob. 112P Ch. 5.5 - Prob. 113P Ch. 5.5 - Solve for the speed of point D in Prob. 5/64 by...Ch. 5.5 - Link OA has a counterclockwise angular velocity =...Ch. 5.5 - Vertical oscillation of the spring-loaded plunger...Ch. 5.5 - A device which tests the resistance to wear of two...Ch. 5.5 - Motion of the roller A against its restraining...Ch. 5.5 - In the design of the mechanism shown, collar A is...Ch. 5.5 - Determine the angular velocity ω of the ram head...Ch. 5.6 - For the instant represented, corner C of the...Ch. 5.6 - The two rotor blades of 800-mm radius rotate...Ch. 5.6 - Prob. 123P Ch. 5.6 - Determine the angular velocity and angular...Ch. 5.6 - The wheel of radius R rolls without slipping, and...Ch. 5.6 - The 9-m steel beam is being hoisted from its...Ch. 5.6 - The bar of Prob. 5/82 is repeated here. The ends...Ch. 5.6 - Prob. 128P Ch. 5.6 - Prob. 129P Ch. 5.6 - Prob. 130P Ch. 5.6 - Prob. 131P Ch. 5.6 - Prob. 132P Ch. 5.6 - Prob. 133P Ch. 5.6 - The switching device of Prob. 5/76 is repeated...Ch. 5.6 - Prob. 135P Ch. 5.6 - Prob. 136P Ch. 5.6 - If the wheel in each case rolls on the circular...Ch. 5.6 - Prob. 138P Ch. 5.6 - The system of Prob. 5/101 is repeated here. Crank...Ch. 5.6 - Prob. 140P Ch. 5.6 - The mechanism of Prob. 5/77 is repeated here. The...Ch. 5.6 - The system of Prob. 5/84 is repeated here. If the...Ch. 5.6 - The shaft of the wheel unit rolls without slipping...Ch. 5.6 - Plane motion of the triangular plate ABC is...Ch. 5.6 - The system of Prob. 5/110 is repeated here. At the...Ch. 5.6 - The velocity of roller A is vA = 0.5 m/s to the...Ch. 5.6 - In the design of this linkage, motion of the...Ch. 5.6 - The mechanism of Prob. 5/112 is repeated here. If...Ch. 5.6 - The bar AB from Prob. 5/74 is repeated here. If...Ch. 5.6 - If the piston rod of the hydraulic cylinder C has...Ch. 5.6 - Prob. 151P Ch. 5.6 - Prob. 152P Ch. 5.6 - The four-bar linkage of Prob. 5/86 is repeated...Ch. 5.6 - Prob. 154P Ch. 5.6 - Prob. 155P Ch. 5.6 - Prob. 156P Ch. 5.7 - The disk rotates about a fixed axis through O with...Ch. 5.7 - The sector rotates with the indicated angular...Ch. 5.7 - The slotted wheel rolls to the right without...Ch. 5.7 - The disk rolls without slipping on the horizontal...Ch. 5.7 - Prob. 161P Ch. 5.7 - An experimental vehicle A travels with constant...Ch. 5.7 - Prob. 163P Ch. 5.7 - Prob. 164P Ch. 5.7 - The small collar A is sliding on the bent bar with...Ch. 5.7 - Prob. 167P Ch. 5.7 - Vehicle A travels west at high speed on a...Ch. 5.7 - Prob. 169P Ch. 5.7 - Prob. 170P Ch. 5.7 - Prob. 171P Ch. 5.7 - Prob. 172P Ch. 5.7 - Prob. 173P Ch. 5.7 - Prob. 174P Ch. 5.7 - Prob. 175P Ch. 5.7 - Prob. 176P Ch. 5.7 - Prob. 177P Ch. 5.7 - Refer to the figure for Prob. 5/177. Car A is...Ch. 5.7 - For the instant represented, link CB is rotating...Ch. 5.7 - The disk rotates about a fixed axis through point...Ch. 5.7 - All conditions of the previous problem remain the...Ch. 5.7 - Prob. 182P Ch. 5.7 - Prob. 183P Ch. 5.7 - One wheel of an experimental vehicle F, which has...Ch. 5.8 - Prob. 185RP Ch. 5.8 - Prob. 186RP Ch. 5.8 - Prob. 187RP Ch. 5.8 - Prob. 188RP Ch. 5.8 - Prob. 189RP Ch. 5.8 - Roller B of the linkage has a velocity of 0.75 m/s...Ch. 5.8 - Prob. 191RP Ch. 5.8 - Prob. 192RP Ch. 5.8 - Prob. 193RP Ch. 5.8 - Prob. 194RP Ch. 5.8 - Prob. 195RP Ch. 5.8 - Prob. 196RP Ch. 5.8 - The isosceles triangular plate is guided by the...Ch. 5.8 - Prob. 198RP Ch. 5.8 - The hydraulic cylinder C imparts a velocity υ to...Ch. 5.8 - Prob. 200RP Ch. 5.8 - The figure illustrates a commonly used...Ch. 5.8 - Prob. 202RP Ch. 5.8 - Prob. 203RP Ch. 5.8 - Prob. 204RP Ch. 5.8 - Prob. 206RP Ch. 5.8 - For the slider-crank configuration shown, derive...Ch. 5.8 - Prob. 212RP

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.