Part A You are standing on a concrete slab that in turn is resting on a frozen lake. Assume there is no friction between the slab and the ice. The slab has a weight five times your weight. If you begin walking forward at 1.80 m/s relative to the ice, with what speed, relative to the ice, does the slab move? ? Vslab = m/s Submit Request Answer < Return to Assignment Provide Feedback

Part A You are standing on a concrete slab that in turn is resting on a frozen lake. Assume there is no friction between the slab and the ice. The slab has a weight five times your weight. If you begin walking forward at 1.80 m/s relative to the ice, with what speed, relative to the ice, does the slab move? ? Vslab = m/s Submit Request Answer < Return to Assignment Provide Feedback

Name: Part AYou are standing on a concrete slab that in turn is resting on
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Description: Part AYou are standing on a concrete slab that in turn is resting on afrozen lake. Assume there is no friction between the slab and theice. The slab has a weight five times your weight.If you begin walking forward at 1.80 m/s relative to the ice, wi

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: The Laws Of Motion

Section: Chapter Questions

Problem 5.2OQ: In Figure OQ5.2, a locomotive has broken through the wall of a train station. During the collision,...

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(a) Why does an ordinary rifle recoil (kick backward) when fired? (b) The barrel of a recoilless rifle is open at both ends. Describe how Newton’s third law applies when one is fired. (c) Can you safely stand close behind one when it is fired?
In Figure OQ5.2, a locomotive has broken through the wall of a train station. During the collision, what can be said about the force exerted by the locomotive on the wall? (a) The force exerted by the locomotive on the wall was larger than the force the wall could exert on the locomotive. (b) The force exerted by the locomotive on the wall was the same in magnitude as the force exerted by the wall on the locomotive. (c) The force exerted by the locomotive on the wall was less than the force exerted by the wall on the locomotive. (d) The wall cannot be said to exert a force; after all, it broke. Figure OQ5.2
Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (b) Draw a free-body diagram, including all forces acting on the system. (c) Calculate the acceleration. (d) What would the acceleration be if friction were 15.0 N?
Two students on rollerskates stand face-to-face, then push each other away. One student has a mass of 90.0kg; the other has a mass of 60.0kg a) find the ratio of the students' velocities just after their hands lose contact. b) which student has the greater speed? c) which student pushed harder?
A ball is held in a person’s hand. (a) Identify all the externalforces acting on the ball and the reaction to each. (b)If the ball is dropped, what force is exerted on it while it isfalling? Identify the reaction force in this case. (Neglect airresistance.)
A 285-g ball falls vertically downward, hitting the floorwith a speed of 2.5 m/s and rebounding upward with a speedof 2.0 m/s. (a) Find the magnitude of the change in the ball’smomentum. (b) Find the change in the magnitude of the ball’smomentum. (c) Which of the two quantities calculated in parts(a) and (b) is more directly related to the net force acting on theball during its collision with the floor? Explain and labled the problems.
A football punter accelerates a football from rest to a speed of 15 m/s during the time in which his toe is in contct with the ball (about 0.19 s). If the football has a mass of 0.46 kg, what average force does the punter exert on the ball? N
Two blocksmịand m2 connected by a rope are being pulled by a horizontalforce F equal 160 N. Suppose that mį=10 kg,20 kg, and the coefficient of kineticm 2 =20 kg10 kgfriction between each block and the surfacem1is 0.52.A. Draw free-body diagrams of both objects.B. Find the acceleration of the systemC. Find the tension in the ropeD. What is the distance that the system ( two masses) will travel if youknow that are started from rest and final velocity is 4.5 m/sec(B) a= { F
1. A 10-kg body falls from rest, with negligible interaction with its surroundings (no friction). Determine its velocity after it falls 5 m. Derive with the formula below, show the cancellation, explain the step by step and draw a free body diagram/figure. refer with this: PE1 + KE1 + U1 + WF1 + Q1 + W1 = PE2 + KE2 + U2 + WF2 + Q2 + W2 + E losses.
A block with a mass of m = 43 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 9.5 N. The second has a magnitude of F2 = 18 N and acts on the body at an angle θ = 17° measured from horizontal, as shown. a) Draw a free body diagram b) Write an expression for the component of net force, Fnet,x, in the x-direction, in terms of the variables given in the problem statement. c) Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2 and the other variables of the problem. Assume that the surface it rests on is rigid. d)Find the block's acceleration in the x-direction, ax, in meters per second squared.
While playing basketball in PE class, a student lost her balance after making a lay-up and collided with the padded wall behind the basket. Her 37 kg body decelerated from 6.6 m/s to 0 m/s in 0.21 seconds. a) Determine the magnitude of the average force in Newtons acting on the student's body during the impact with the padded wall. b)
A block with a mass of m = 16 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 8.5 N. The second has a magnitude of F2 = 19.5 N and acts on the body at an angle θ = 11° measured from horizontal, as shown. a.) Write an expression for the component of net force, Fnet,x, in the x-direction, in terms of the variables given in the problem statement. b.) Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2 and the other variables of the problem. Assume that the surface it rests on is rigid. c.) Find the block's acceleration in the x-direction, ax, in meters per second squared.