Figure 5-27 shows three blocks being pushed across a frictionless floor by horizontal force
Figure 5-27 Question 10.
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
Fundamentals Of Physics - Volume 1 Only
- The force F, acting in a constant direction on the 17-kg block, has a magnitude which varies with the position s of the block. When s = 0 the block is moving to the right at v = 6 m/s. The coefficient of kinetic friction between the block and surface is μk = 0.3 a) Determine how far the block must slide before its velocity becomes 15 m/s.arrow_forwardA bartender slides a mug of root beer with mass m - 2.4 kg down a bar top of length L 1.8 m to an inattentive patron who lets it fall a height h 1.4 m to the floor. The bar top (see figure below) is smooth but still has a coefficient of kinetic friction of HK 0.078. (Assume up and to the right as the positive directions.) (a) If the bartender gave the mug an initial velocity of 2.5 m/s, at what distance D from the bottom of the bar will the mug hit the floor? 0.9996 m (b) What is the mug's velocity (magnitude and direction) as it impacts the floor? Magnitude 75 Direction (counterclockwise from the +x-axis) 68.9 X m/s x ° (c) Draw velocity time diagrams for both the x and y directions for the mug, from the time when the bartender lets: go of the mug to when it hits the floor. Need Help? Read I Submit Answerarrow_forwardBeginning at time t = 0, a student exerts a horizontal force on a box of mass 30 kg, causing it to move at 1.2 m/s toward an elevator door located 16 m away, as shown above. The coefficient of kinetic friction uk between the box and the floor is 0.20. (b) Calculate the magnitude of the horizontal force the student must exert on the box in order to keep it moving at 1.2 m/s.arrow_forward
- In the figure, a crate of mass m = 76 kg is pushed at a constant speed up a frictionless ramp (0 = 33°) by a horizontal force F.The positive direction of an x axis is up the ramp, and the positive direction of a y axis is perpendicular to the ramp. (a) What is the %3D magnitude of F? (b) What is the magnitude of the normal force on the crate? (a) Number i Units (b) Number i Unitsarrow_forwardA block of mass M slides down a frictionless plane inclined at an angle 0 with the horizontal. the normal reaction force exerted by the plane on the block ?arrow_forwardFour people are attempting to move a stage platform across the floor. If they exert the horizontal forces shown, determine (a) the equivalent force-couple system at O and (b) the points on the x- and y-axes through which the line of action of the single resultant force R passes. Assume F1-69 lb, F2-60 lb, F3-32 lb. F4-61 lb,a-75 in, b-60 in, and = 47° F₁ F₁- Answers: (a) The force-couple system at O R= b Mo- (i i (b) The line of action of the single resultant R: On the x-xx- On the y-axis y i klb-in in. in.arrow_forward
- A 1200-kg trailer is hitched to a 1400-kg car. The car and trailer are traveling at 72 km/h when the driver applies the brakes on both the car and the trailer. Knowing that the braking forces exerted on the car and the trailer are 5000 N and 4000 N, respectively, determine (a) the distance traveled by the car and trailer before they come to a stop, (b) the horizontal component of the force exerted by the trailer hitch on the car.arrow_forwardAn engine of mass 5000 kg pulls a train of ten trucks each of mass 2000 kg along a horizontal track. Assume that the frictional forces to be 5000 N and that the engine exerts a force of 50,000 N on the rails. If the trucks are numbered from 1 to 10 starting with the one next to the engine calculate: (a) the net total accelerating force (b) the acceleration of the train (c) the force of truck 6 on truck 7 (d) the force of truck 9 on truck 8arrow_forwardAn object moves to the right while subject to a force whose magnitude increases with time but points to the left. Which of the following statements is true? (a) The particle will reverse direction as soon as the force is applied. (b) The particle will slow down and eventually reverse direction. (c) The particle will not slow down because the magnitude of the force decreases with time. (d) The particle will not reverse direction.arrow_forward
- In 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 0.92 m by the horizontal 26 N force from the broom and then has a speed of 1.28 m/s, what is the coefficient of kinetic friction between the book and floor?arrow_forwardA block of mass m1 = 3.9 kg is placed on top of a block with mass m2 = 5.4 kg. A force, F = is applied to m2, at an angle 16.1 degrees above the horizontal. If the coefficient of static friction between all moving surfaces is 0.42 and the coefficient of kinetic friction is 0.32, determine the magnitude of the minimum force that will get the blocks moving.arrow_forward(a) the magnitude and (b) the angle (relative to the positive direc- tion of the x axis) of the net force on the particle, and (c) what is the angle of the particle's direction of travel?arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON