College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- There is a worker that slides a heavy box up a ramp into a truck. The box has a mass of 70 kg. The ramp is 4.7 m long and makes an angle of 27 degrees with the horizontal. The coefficient of friction between the ramp and box is 0.4 1.What's the weight of the box? 2.What's the normal force acting on box? 3.What's the force of friction acting on box?arrow_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_forwardA box rests on top of a flat bed truck. The box has a mass of m = 20 kg. The coefficient of static friction between the box and truck is u, = 0.81 and the coefficient of kinetic friction between the box and truck is Hk = 0.62. 1) The truck accelerates from rest to v; = 16 m/s in t = 12 s (which is slow enough that the box will not slide). What is the acceleration of the box? m/s Submit You currently have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 2) In the previous situation, what is the frictional force the truck exerts on the box? N Submit You currently have 0 submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 3) What is the maximum acceleration the truck can have before the box begins to slide? m/s Submit You currently have O submissions for this question. Only 5 submission are allowed. You can make 5 more submissions for this question. 4) Now the…arrow_forward
- A crate sits on a horizontal floor that has µk is not equal 0.You push the crate with a horizontal force. Draw a FBD of the crate, and label all of the forces.arrow_forwardThe 498-N force is applied to the 89-kg block, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the block. The force is positive if to the right, negative if to the left. H₂ = 0.66 H = 0.52 Answer: F= i 36° N P = 498 Narrow_forwardA coin is resting on the surface of a closed book. As you slowly open the cover, the coin remains in place (it doesn't slide). When the book's cover is open 14 degrees, the coin finally starts sliding down. What is the coefficient of static friction between the book and the coin? Answer to 3 decimal places (e.g. 0.123).arrow_forward
- Use g = 10 m/s2 Always answer in standard units (SI units). Unless otherwise instructed. Answer to 2 decimal places. Unless otherwise instructed. Consider an object of mass m starting from rest and sliding down a ramp. The ramp makes angle theta = 30 degrees relative to the ground. The coefficient of static friction and the coefficient of kinetic friction between the object and the ramp are both 0.5. The distance S = 1m between the object and the end of the ramp. What is the speed of the object when it reaches the end of the ramp?arrow_forwardIf the coefficient of kinetic friction, lk, between the block and the surface is 0.40 and the magnitude of the frictional force is 80.0 N, what is the weight of the block? 1.6 N 160 N 166 N 200 N 410 Narrow_forwardAn 5.2 kg wooden block is held against a wall with force (Fx) = 9.8 N. The friction coefficient between the two surfaces (µ)=0.50. Determine the acceleration of the block if a upward force of 36.0 N is applied. Use positive for an upward acceleration and negative for a downward acceleration.arrow_forward
- A sled is on a horizontal surface and a rope with tension T is pulling on it at an angle e above the horizontal. The sled had mass M and does not move due to the frictional force. In this case the coefficient of friction is ug. In terms of the variables given and g, what is the magnitude of the frictional force in this case? Select one: O a. Tcose O b. H, Mgsin0 Ос. Tsin® O d. H, Mgcosearrow_forwardF(t) Force_Crate Known values: Mass of Block 68 kg TT Hs μk 0 0.63 0.53 26° Problem Statement: A crate is initially at rest on a sloped surface, when a force is applied: F(t) where t is in seconds. Answers: When t=44.47 seconds, the crate has not yet started moving. Find the magnitude of the friction force at that time: 317.771 N The direction of the friction force at that time is: down the slope Find the time required for the crate to start moving: Find the crate's speed when t=174.9 s: 9.485 m/s Be sure to include units with your answers. 169.756 S 240+0.2 N,arrow_forwardA crate that has a mass of m = 3.5 kg rests on a horizontal plane. The coefficient of static friction, μs, is 0.25. A horizontal force, F, is applied to the crate, and it is just enough to get the crate to begin moving.a. write an expression for the sum of the forces in the x-direction using that Ff is the static friction force, FN is the normal force and Fg is the weight.b. write an expression for the sum of forces in the y-direction using the same coordinate systemc. calculate the magnitude of F, in newtons, Ff is at its maximumarrow_forward
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