A dockworker applies a constant horizontal force of 81.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 m in a time of 5.20 s . What is the mass of the block of ice? Express your answer in kilograms. • View Available Hint(s) You may want to review (Page). Hνα ΑΣφ For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Determining force from acceleration. m = kg Submit

A dockworker applies a constant horizontal force of 81.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 m in a time of 5.20 s . What is the mass of the block of ice? Express your answer in kilograms. • View Available Hint(s) You may want to review (Page). Hνα ΑΣφ For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Determining force from acceleration. m = kg Submit

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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e) Figure Q4b shows a pulley system suspended by a hook and a bolt fixed to the ceiling. The pulley system is used to lift a load (FL) of 250 N when an effort force (FE) is applied. Determine the tension force in each support rope, the effort force (FE) and reaction force (FR) necessary to lift and hold a load of 250 N. *Assume that the pulley system is weightless and frictionless. FR +3 www FE d₂ d₁ ↑ FL Figure Q4b (Illustrative and not to scale) f) Calculate the ideal mechanical advantage (IMA) for the pulley system in Figure Q4b and calculate the distance d₁ moved when distance d₂ is 1.75 m.
PROBLEM 1 Two masses m₁ and m₂ are placed on a horizontal plane without friction. A spring with negligible. mass is placed between the two masses. The masses are pushed one against each other such that the spring is compressed by an amount Ax. The two masses are then released and let free to slide on the plane. The first one (m₂) moves to the left with initial velocity voi, climbs up on an incline up to a height of h-5cm with final velocity v₁-8m/s. The second one m₂ moves to the right on the horizontal plane with velocity voz. Knowing that m₂=3m₁ compute: a) The velocity Voz of the second mass after the spring has decompressed (note that the values Of the masses, the spring compression and the spring constant are unknown). Suppose now that m₁ = 0.5 Kg, m₂ = 1.5 Kg, Ax = 10 cm. X. b) Compute the elastic constant k of the spring. wwwwww mi M₂
The 1.1 kg physics book in figure is connected by a string to a 550 g coffee cup. The book is given a push up the slope and released with a speed of 3.5 m/s. The coefficients of friction are μ = 0.50 and μ = 0.20. (Figure 1) Figure 20⁰ 1 of 1 Part A How far does the book slide? Express your answer with the appropriate units. Value Submit Part B μA Submit O stick to the slope O slide back downhill Provide Feedback Units Request Answer At the highest point, does the book stick to the slope, or does it slide back down? ? Request Answer
Determine the magnitude of the vertical reaction at A if P = 326 N and Q = 1187 N. Let x = 2.55 m, y = 2.5 m, and z = 2.09 m. Round off only on the final answer expressed in 3 decimal places. Instead of units, indicate the direction of the vertical reaction at A : use U if upward, D if downward.
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Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 740 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole? Number i Units ho
Two boxes, Box A and Box B, are given an initial push and start moving at equal speed along a level, frictionless surface. The Box B has twice the mass of Box A. They both slide up the same frictionless incline plane. Which box rises to a greater height? Group of answer choices A) Box A rises to the greater height because it weighs less. B)The two objects rise to the same height. C) Box B rises to the greater height because it contains more mass. D) Box A rises to the greater height because it possesses a smaller amount of kinetic energy. E) Box B rises to the greater height because it possesses a larger amount of kinetic energy.
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You and your friend are moving a 82kg box across the floor at a constant speed. You are pushing on the crate parallel to the ground with a force of 62N. Your friend has a rope tied to the box and they are pulling it at an angle of 37° to the ground with a force of 32N. Construct the free body diagram showing the force acting on the crate in order to find the magnitude of friction the floor exerts on the box.
Current Attempt in Progress A 18-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 22 N. Starting from rest, the sled attains a speed of 2.5 m/s in 9.2 m. Find the coefficient of kinetic friction between the runners of the sled and the snow. Number i eTextbook and Media GO Tutorial Save for Later Units Attempts: 0 of 4 used Submit Answer
Between two ski hills, there is a valley. Hill l is 735m and the second hill is 625m. From point A to point B, a skier skis. The skier starts at rest at point A and finishes at rest at point B. Between the two points, the total length of the path is 4.11m with an average slope of 40 degrees from the horizontal. a) Sketch the free body diagram and show all the forces on the skier. Indicate the location where the gravitational potential energy is equal to zero on the diagram. b) assuming the system is skier and the earth, and there is friction involved between the ski and the snowy ground ( coefficient of kinetic friction), determine the thermal energy that is lost to the surrounding when the skier is skiing from point A to point B in terms of variables, m, L and theta c) Calculate the value of coefficient of kinetic friction between snow and ski which would make the skier stop at the top of the lower point B