PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
6th Edition
ISBN: 9781429206099
Author: Tipler
Publisher: MAC HIGHER
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Chapter 12, Problem 63P
To determine
The coefficient of friction if the box is to slide.
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A flexible cable as shown in the figure which supports the 100-kg load passed over a fixed circular drum and subjected to a force P to maintain equilibrium. The coeficient of static friction between the cable and the fixed drum is 0.30. For P = 500 N, determine the minimum value which the angle a may have before the load begins to slip.
A uniform meter stick of weight W is held by a thumb pushing down at the 0-cm line and by fingers pushing up at the 5-cm line. What are both forces on the meter stick, the force of the thumb T and the force of the fingers F?
The upper end of a wide-skid W 8 × 21 steel column (E = 30 × 103 ksi) is supported laterally between two tubes (see figure). The tubes are not attached to the column and the friction between the tubes and the column is not reliable. The base of the column provides fixed support and the column is 13 ft long. Determine the critical load for the column, consider the Euler buckling in the web plane and also perpendicular to the web plane.
Chapter 12 Solutions
PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
Ch. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - Prob. 10P
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- A box with a uniform mass of 50 kg is supported on a surfaceflat, when a force P is applied to it, as shown in the figure. The coefficient of dynamic friction between the box and the surface is 0.2. Determine the acceleration of the box. Further,confirm that the box is sliding and not tipping.arrow_forwardClimbers attempting to cross a stream place a 340-kg log against a vertical, frictionless ice cliff on the opposite side (as illustrated in the Figure below). The log slopes up at 27 degrees and its center of gravity is one-third of the way along its 6.3-m length (as marked in the Figure). If the coefficient of friction of the log and the ground is 0.92, what’s the maximum mass of climber and pack to cross without the log slipping?arrow_forwardh L GAS A 45.0 kg sign hangs at the end of a bar where L = 3.10 meters in length. A cable attaches to the end of the horizontal bar and to a wall 2.70 meters above where the bar is attached to the wall. The bar has a mass of 13-kg. What is the tension in the cable? Give your answer in Newtons to 3 significant figures (no decimal places in this case).arrow_forward
- a 8-53.. A lantern of weight W is suspended at the end horizontal bar of weight w and length L that is supported by a cable that makes an angle with the side of a vertical wall. Assume the weight of the bar is at its center. (a) Derive an equation for the tension in the cable. (b) Calculate the tension in the cable for a bar of weight 28 N and length 1.5 m, plus a lantern of weight 85 N, and the cable making a 37° angle to the vertical. 40² Darrow_forwardIn 1967 Mercedes-Benz presented their new steep-bank track with a maximum bank angle of 90 degrees to the horizontal as shown below. At that time they were testing the “new” SEC450 model that has a track width of 1.5m and its center of gravity lies midway between the wheels. The center of gravity is 0.75 meters above the horizontal and the coefficient of friction between the tyres and the road surface is 0.7under dry conditions.Determine the following:a) The maximum speed in km/h at which this car could round an unbanked bend of 75 meters radiusb) The angle to the horizontal the driver must bank to ensure “no-side slip” conditions at a speed of 60 km/hc) If the driver moves up the incline to 15 degrees to the horizontal, determine the speed at which the car in (a) above would now skid in this bend.arrow_forwardDetermine the reaction at the smooth wall. The top of the 15kg ladder is leaning against a very smooth wall. Assume that the mass cebter of the painter is directly above his feet and that the coefficient of friction between the horizontal ground and the ladder is 0.25.arrow_forward
- In a science fiction story about space exploration an expedition to Mars was described. The space shiplanded in a rocky valley and the astronauts promptly prepared their vehicle for a trip on the planet surface.This special vehicle was designed with big inflated tires. On the very first steep slope the vehicle tippedover. They did have small steel balls onboard to increase traction. They thought of suspending a bunch ofthem beneath the vehicle to lower its centre of gravity, but that would decrease the clearance and cause theweights to strike rocks and the ground more often. What can they do? Provide your answer with a briefexplanation of a potential solution.arrow_forwardI need help with this Hw Problem.arrow_forwardOne end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle ? with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.400. What is the maximum value thetheta can have if the stick is to remain in equilibrium?arrow_forward
- A plastic board with length X and mass Y is leaning against a frictionless wall. The plastic b. made an angle of 65º w/ resp. to the rough floor. The plastic b. is in static eqlbrium hence the board does not slip. Calculate the minimum friction coefficient between the plastic b. and the ground. Please write the solutions clearly and completely. Thank you.arrow_forwardA uniform 4.0-m plank weighing 200.0 N rests against the corner of a wall, as shown below. There is no friction at the point where the plank meets the corner. (a) Find the forces that the corner and the floor exert on the plank. (b) What is the minimum coefficient of static friction between the floor and the plank to prevent the plank from slipping?arrow_forwardCalculate the horizontal force P on the light 13° wedge necessary to initiate movement of the 59-kg cylinder. The coefficient of static friction for both pairs of contacting surfaces is 0.33. Also determine the friction force Få at point B. (Caution: Check carefully your assumption of where slipping occurs.) P Answers: P = FB = i 138 59 kg B N N Aarrow_forward
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