Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 5, Problem 49P
To determine
To calculate: The exact values of acceleration of two books of mass 1Kg each that is kept on top of each other, when a force of 30N is applied horizontally on them.
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Chapter 5 Solutions
Physics Fundamentals
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- 15-9. The 200-kg crate rests on the ground for which the coefficients of static and kinetic friction are µ, = 0.5 and Hk =0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Determine the speed of the crate when 1= 4 s. Originally the tension in the cable is zero. Hint: First determine the force needed to begin moving the crate. T (N) 800 T = 400 2 -t (s) 4arrow_forwardFind the height upto which an insect can crawl up a fixed hemispherical bowl of radius r , the coefficient of friction=(1/3).arrow_forward*3-12. The load has a mass of 15 kg and is lifted by pulley system shown. Determine the force F in the cord function of the angle 9. Plot the function of force F ve the angle for 0 ≤ 0 ≤ 90°. of Prob. 3-12 45° Farrow_forward
- A bicyclist can coast down a 6.17 degree hill at a constant speed of 6.64 km/h. If the force of air resistance is proportional to the speed vso that Fair = c v, calculate the average force (in N) that must be applied in order to descend the hill at 13.0 km/h. The mass of the cyclist plus bicycle is 77.8 kg.arrow_forwardRedo Example 5, assuming that there is no upward lift on the plane generated by its wings. Without such lift, the guideline slopes downward due to the weight of the plane. For purposes of significant figures, use 2.91 kg for the mass of the plane, 12.2 m for the length of the guideline, and 18.2 and 36.4 m/s for the speeds. (a) Number (b) Number Units Unitsarrow_forwardProblem 3: Incline with Friction |A mass m = 2 kg is launched with an initial speed vo = 1 m/s down an incline with coefficient of static friction H, = 3/4 and coefficient of kinetic friction A = 2/3. It travels a distance L = 4 m down the incline before reaching the bottom of the incline with speed vy. The angle 0 such that the values of cos(8) and sin(0) are the ones provided below and you may use g = 10 m/s².arrow_forward
- A bicyclist starting from rest applies a force of F = 396 N to ride his bicycle across flat ground for a distance of d = 295 m before encountering a hill making an angle of theta = 29 degrees with respect to the horizontalThe bicycle and rider have a mass of m = 105 kg combined. In this problem, you can ignore air resistance and other losses due to friction What is the bicycle speed, v in m/s just before the hill ? If the cyclist start coasting at the bottom of the hill what distance , di in meters does the bike travel up in the inclinearrow_forwardAt what angle θ must the 370-lb force be applied in order that the resultant R of the two forces have a magnitude of 940 lb? For this condition what will be the angle β between R and the horizontal?arrow_forwardThe acceleration of a package sliding down section AB of the incline ABC is 18 ft/sec/sec. Assuming the coefficient of kinetic friction is the same for each section, determine the acceleration of the package in section BC of the incline.arrow_forward
- The plane below is inclined of 25 degrees. The block of mass 1 is 15Kg and mass 2 is 4Kg. If the coefficient of kinetic friction is 0.2, calculate the magnitude of the acceleration.arrow_forwardAn box of mass 12kg is pulled up a frictionless inclined plane by a force of 200N parallel to its direction of motion. The plane is at an angle of 20° to the horizontal. What is the resultant force on the box?arrow_forward1. Given that sinθ = 2/3 and cosθ = √5/3, find the cotθ, and tanθ. 2. To move a large crate across a rough floor, you push on it with a force F at an angle of 21° below the horizontal, as shown in Figure 6–18. Find the force necessary to start the crate moving, given that the mass of the crate is 32 kg and the coefficient of static friction between the crate and the floor is 0.57. Find the acceleration of the crate if the applied force is 330 N and the coefficient of kinetic friction is 0.45.arrow_forward
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