An adapted golf device attaches to a wheelchair to help people with mobility impairments play putt-putt. The stationary frame OD is attached to the wheelchair, and a club holder OB is attached to the pin at O. Holder OB is 6 in. long and weighs 8 oz, and the distance between O and D is x = 1 ft. The putter shaft has a length of L = 36 in. and weighs 10 oz, while the putter head at A weighs 12 oz. Knowing that the 1-lb/in. spring between D and B is unstretched when θ = 90° and that the putter is released from rest at θ = 0, determine the putter head speed when it hits the golf ball.
Fig. P17.19
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Vector Mechanics for Engineers: Statics and Dynamics
Additional Engineering Textbook Solutions
HEAT+MASS TRANSFER:FUND.+APPL.
Introduction To Finite Element Analysis And Design
Engineering Mechanics: Statics
Degarmo's Materials And Processes In Manufacturing
Fundamentals Of Thermodynamics
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
- A torque T = 0.30 N-m is applied to a bevel gear B. Bevel gear D meshes with gear B and drives pump A. Gear B has a radius of gyration of 150 mm and a weight of 50 N, whereas gear D and the im- peller of pump A have a combined radius of gy- ration of 50 mm and a weight of 100 N. Find how many revolutions of gear B are needed to get the pump up to 200 rpm from rest. What is the power output of the pump at this speed if it is 90% efficient.arrow_forwardIn the slider-crank mechanism shown, the slide B travels along the center line XX'. Q,A = 1 ½ inches, AB = 6 inches. Crank Q,A moves counterclockwise. (1) Find the two extreme positions of B. (2) Show and dimension the angular movements in degrees of the crank Q2A when the slide B moves between its extreme positions. (3) Find the length of stroke of B. Use Kg: 1 in. = 2 cm. X' VERTICAL DISTANCE FROM Q2 TO B' = INCHES VERTICAL DISTANCE FROM Q2 TO B" = INCHES ANGULAR DISPLACEMENT FROM A' TO A" = DEGREES ANGULAR DISPLACEMENT FROM A' TO A' = DEGREES LENGTH OF STROKE OF B = INCHESarrow_forward6. A shaft with 3 metres span between two bearings carries two masses of 10 kg and 20 kg acting at the extremities of the arms 0.45 m and 0.6 m long respectively. The planes in which these masses rotate are 1.2 m and 2.4 m respectively from the left end bearing supporting the shaft. The angle between the arms is 60°. The speed of rotation of the shaft is 200 r.p.m. If the masses are balanced by two counter-masses rotating with the shaft acting at radii of 0.3 m and placed at 0.3 m from each bearing centres, estimate the magnitude of the two balance masses and their orientation with respect to the X-axis, i.e. mass of 10 kg.arrow_forward
- Q1/ A shaft rotating at 120 r.p.m is supported in bearing 4 and B, 1.8 m apart, A being at the left – hand end. Two unbalanced rotating masses of 7.5 kg and 10 kg at radii of 75 mm and 50 mm respectively are situated between A and B at distances of 0.6 m and 0.9 m respectively from A. The angle between the radii is 60" when viewed along the shaft. Answer the following questions: 1- The dynamic forces are .. 2- Forces on bearings A and B due to dead weight are 3- Resultant force at A and B are . and .. 4- A rotor supported at A and B carries two masses. The rotor is . (a) dynamically balanced (b) statically balanced (c) both (a)&(b) (d) none. 5- The static balancing is satisfactory for low-speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the and . and (a) unbalanced couples are caused only at higher speeds (b) unbalanced forces are not dangerous at higher speeds (c) effects of unbalances are proportional to the square of the speed (d)…arrow_forwardQ#1: Four masses A, B, C and D carried by a rotating shaft at radii 80 mm, 100mm, 160 and 120 mm respectively are completely balanced. Masses B, C and D are 8 kg, 4 kg and 3kg respectively. Determine the mass A and the relative angular positions of the four masses if each of the plane are spaced 500 mm apart.arrow_forwardMember ABC is controlled using a rack and pinion, which is connected at B. (The rack is the long, horizontal gear.) The rack can only move horizontally and the pinion does not translate. A block in a sleeve is connected at A and allows movement only in the vertical direction. Member ABC has a total length of 2.40 m and the distance between A and B is 1.25 m1.25 m . When member ABC forms an angle of θ=37.0∘ with the rack, the acceleration of B is aB=1.95 m/s2 and the velocity of the block attached at A is vA=3.15 m/s in the direction shown. Positive angular velocity and acceleration are in the counterclockwise direction. A) Find the acceleration of A at the instant shown. Indicate the direction with the sign based on the axes in the figure. aA= B) Find acceleration of C, aC, at the instant shown. Give your answer in component form. aC=arrow_forward
- Each of the gears A and B has a mass of 10 kg and a radius of gyration of 190 mm, while gear Chas a mass of 2.5 kg and a radius of gyration of 80 mm. Consider that a couple M of constant magnitude 10 N-m is applied to gear C. 250 mm 250 mm 100 mm Determine the corresponding tangential force acting on gear A. The corresponding tangential force acting on gear A is 26.35 O N.arrow_forwardUsing an engineer's level, the reading on a rod 60m away was observed to be 2.847m. The bubble was leveled thru 3 spaces on the level tube and the rod reading increased to 2.874m. Determine the angular value of one space of the tube in seconds of arc.arrow_forwardA shaft carries four masses 4, B, C and D are to be completely balanced and revolving at radii 40 mm, 50 mm, 60 mm and 30 mm respectively. The magnitude of masses B, C and D is 10 kg. 18 kg, and 15 kg respectively. The angular position of the masses B, C and D is 60°, 135° and 270° respectively. The magnitude and position of the mass A is. O 50 kg, 93.40 45 kg, 66.40 35 kg, 39.40 Non mentioned 22.66 kg, 304.50 O O O O Carrow_forward
- Greek engineers had the unenviable task of moving large columns from the quarries to the city. One engineer, Chersiphron, tried several different techniques to do this. One method was to cut pivot holes into the ends of the stone and then use oxen to pull the column. The 4-ft diameter column weighs 12,000 lbs, and the team of oxen generates a constant pull force of 1500 lbs on the center of the cylinder G. Knowing that the column starts from rest and rolls without slipping, determine (a) the velocity of its center G after it has moved 5 ft, (b) the minimum static coefficient of friction that will keep it from slipping.arrow_forwardA, B, C and D are the four masses carried by a shaft in this order. Radii of rotation of the masses are 20cm, 25 cm, 10 cm and 15 cm respectively. The masses of B, C and D are 3 kg, 5 kg and 4 kg respectively.The planes containing B and C are 25 cm apart. Angle between B and C is 90o and between B and D is220o measured in anticlockwise direction. For complete dynamic balance, find (i) The mass and angularposition of A, (ii) The position of planes A and D.arrow_forwardA shaft carries four masses A, B, C and D of magnitude 10 kg, 20 kg, 15 kg and 25 kg respectively and revolving at radii 100 mm, 50 mm, 80 mm and 120mm in planes measured from A at 100 mm, 300 mm and 500 mm. The angles between the cranks measured anticlockwise are A to B = 40°, B to C = 50° and C to D = 150°. The balancing masses are to be placed in planes X and Y. The distance between the planes A and X is 50 mm, between X and Y is 350 mm. If the balancing masses revolve at a radius of 50 mm, find the magnitude for mass on plane X (consider plane X as the refernce plane).arrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L