COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 48QAP
To determine
The minimum magnitude of force required to move the crate to the right and the corresponding magnitude of the tension Tin the rope that connects the box to the wall when the crate is moved.
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A 2.17-kg object is situated at rest on a horizontal surface with a static friction coefficient of 0.56. Calculate the maximum force of the static friction.
Two blocks, of weights 2.0 N and 5.4 N, are connected by a massless string and slide down a 33° inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.061; that between the heavier block and the plane is 0.17. Assuming that the lighter block leads, find (a) the magnitude of the acceleration of the blocks and (b) the tension in the string.
This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the directional angle θ is the same. Kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.320. The weight of the block is 50.0 N, and the directional angle for the force F→ is θ = 49.0°. Determine the magnitude of F→ when the block slides (a) up the wall and (b) down the wall.
Chapter 5 Solutions
COLLEGE PHYSICS
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- A block is placed on the midpoint of a ramp that is inclined at an angle of 39.8º from the horizontal, at which point the block immediately starts to slide down the ramp due to the fact that the static friction limit for this particular case is insufficient to hold the block in place. If the coefficient of kinetic friction between the block and the ramp is 0.277 , what is the magnitude of the acceleration of the block as it slides down the ramp.arrow_forwardBlock B in Fig. 6-31 weighs 711 N.The coefficient of static friction between block and table is 0.25; angle u is 30; assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary.arrow_forwardIn a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 3.5 kg book is pushed from rest through a distance of 0.90 m by the horizontal 25 N force from the broom and then has a speed of 1.60 m/s, what is the coefficient of kinetic friction between the book and floor?arrow_forward
- A moving truck (m = 3200 kg) is parked on a hill that is inclined at an angle of 11◦ from the horizontal. Assuming that the static friction between the truck and surface on which it is parked is at its maximum value, what is the coefficient of static friction of the surface?arrow_forwardIf the coefficient of kinetic friction, , between the block and the surface is 0.30 and the magnitude of the frictional force is 80.0 N, what is the weight of the block? 267 N 1.66 N 166 N 4.00 Narrow_forwardf the mass of the box is 2.55 kg, the angle of the incline is 40o, and the coefficient of static friction, , between the crate and the incline is 0.37, rank the forces according to their magnitudes. Prompt 1The weight of the block Answer for prompt 1 The weight of the block Prompt 2The Static Friction Force between the block and the ramp Answer for prompt 2 The Static Friction Force between the block and the ramp Prompt 3The Normal Force between the block and the ramp Answer for prompt 3 The Normal Force between the block and the ramp Prompt 4The Tension in the stringarrow_forward
- A student of mass 57.4 kg, starting at rest, slides down a slide 17.2 m long, tilted at an angle of 26.1° with respect to the horizontal. If the coefficient of kinetic friction between the student and the slide is 0.133, find the force of kinetic friction, the acceleration, and the speed she is traveling when she reaches the bottom of the slide. (Enter the magnitudes.)arrow_forwardBlock A in Fig. P5.72 weighs 60.0 N. The coefficient of static friction between the block and the surface on which it rests is 0.25. The weight w is 12.0 N and the system is in equilibrium. (a) Find the friction force exerted on block A. (b) Find the maximum weight w for which the system will remain in equilibrium.arrow_forwardConsider a 9.74-kg box on a ramp angled at 47.7 degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.161 and the coefficient of static friction is 0.415. Find the magnitude of the acceleration (in m/s2) of the box down the ramp.arrow_forward
- A block of mass 4.20 kg is pushed up against a wall by a force P that makes an angle of θ = 50.0° angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.300. (a) Determine the possible values for the magnitude of P that allow the block to remain stationary. (If there is no maximum, enter NONE in that answer blank.) |Pmax| = N |Pmin| = Narrow_forwardA box of mass ?= 5.00 kg is at rest on a horizontal rough surface. The coefficients of static friction and kinetic friction between the surface and the box are μ?= 0.450 and μ?= 0.400, respectively. Then, a horizontal force ?⃗ is exerted on the box. a. If the magnitude of the force ?⃗ is 12.0 N, what is the magnitude of the friction force on the block? b. If the magnitude of the force ?⃗ is 25.0 N, what is the magnitude of the acceleration of the block?arrow_forward
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