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Mountain biker While mountain biking, you first move at constant speed along the bottom of a trail’s circular dip and then at constant speed across the top of a circular hump. Assume that you and the bike are a system. Determine the direction of the acceleration at each position and construct a force diagram for each position (consistent with the direction of the acceleration). Compare at each position the magnitude of the force of the surface on the bike with the force Earth exerts on the system.
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Chapter 5 Solutions
COLLEGE PHYSICS:VOL.1
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- In the figure, a car is driven at constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is O. The driver's mass is 66.0 kg. What is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley? Number i Units Radius Radiusarrow_forward%3D Assume the three blocks portrayed in the figure below move on a frictionless surface and a force F = 46-N acts as shown on the m = 3.0-kg block. F 1.0 kg 2.0 kg (a) Determine the acceleration given this system. m/s? (to the right) (b) Determine the tension in the cord connecting the 3.0-kg and the 1.0-kg blocks. (c) Determine the force exerted by the 1.0-kg block on the 2.0-kg block.arrow_forwardThe Sliding Hockey Puck A hockey puck on a frozen pond is given an initial speed of 15.0 m/s. If the puck always remains on the ice and slides 116 m before coming to rest, determine the coefficient of kinetic friction between the puck and ice. After the puck is given an initial velocity to the right, the only external forces acting on it are the gravitational force mg, the normal force n, and the force of kinetic friction fk Motion mg SOLUTION Conceptualize Imagine that the puck in the figure slides to the right. The kinetic friction force acts to the |---Select--- v and slows the puck, which eventually comes to rest due to that force. Categorize The forces acting on the puck are identified in the figure, but the text of the problem provides kinematic variables. Therefore, we categorize the problem in several ways. First, it involves modeling the puck as a particle ---Select--- v in the horizontal direction: kinetic friction causes the puck to accelerate. There is no acceleration of…arrow_forward
- PRINTER VERSION 4 ВАСК NEXT Z Your answer is partially correct. Try again. A 2.70 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 5.98 N and a vertical force P are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and u = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)10.0 N and (b)14.0 N. (The upward pull is insufficient to move the block vertically.) m em em (a) Number 5.9 Units em lem (b) Number T7.37 Units lem Click if you would like to Show Work for this question: Open Show Work lem plem SHOW HINT blem LINK TO TEXT LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE blem e here to search 7:12 PM ENG 4/4/2021 13) 17 pause break eno Pgup prt sc delete hon insert 115Pgdn %23 3 4 5. backspo 远arrow_forwardFriction Problem The 200kN block shown has 200 impending motion up the plane caused by horizontal force of 400kN. Determine the coefficient of Static Force 400 between the contact surfaces. A. Draw the Free Body Diagram B. Complete Solution 30% R 45arrow_forwardA car with a mass of 922 kg rounds the top of the hill at a speed of 10 m/s. The friction between the wheels and the road is negligible and the radius of curvature for the hill is 32 m. A. Draw the force diagram and write down a Newton’s 2nd law equation for the car when it is at the top of the hill. B. Find the magnitude of the normal force on the car when it rounds the hill at this speed. C. What is the maximum speed at which the car could round this hill without losing contact with the road?arrow_forward
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