QUESTION 14Two different sleds with sails attached to them are used in a race on a frictionless, horizontal stretch of ice. Both sleds(one of mass m, the other of mass 2m) start from rest, and the wind exerts the same constant force on both sails. Whichsled crosses the finish line with more kinetic energy?The sled of mass m; it has twice as much kinetic energy as the sled of mass 2mThe sled of mass 2m; it has four times as much kinetic energy as the sled of mass mThe sled of mass 2m; it has twice as much kinetic energy as the sled of mass mThe sled of mass m; it has four times as much kinetic energy as the sled of mass 2mO Both sleds cross the finish line with the same amount of kinetic energyQUESTION 15AnsFor an object displaced d while acted on by a net constant force FO the work done by È is zero so long as d and F are perdendicular.the work done by F is independent of the relative orientation of the force and displacement.the work done by À is zero so long as is equal in magnitude and in the opposite direction of F.the work done is generally given by |d||F|sin(e) where e is the angle between d and F. AnswA small cannonball with mass 5 kg is traveling horizontally at 66 m/s and hits a large 50 kg wooden block that is initiallyat rest on a smooth horizontal bench. Upon impact, the cannonball buries itself inside the block. What is the speed ofthe block-cannonball system just after this happens? You can assume that friction is negligble.330 kg m/s6 m/sO 12 m/sO 726 m/sBill pushes a block up an inclined ramp at constant speed. There is friction between the block and the ramp. The rate atwhich Bill's pushing force does work on the block isO there is not enough information to decidegreater than the rate at which the force of friction does work on the blockthe same as the rate at which the force of friction does work on the blockless than the rate at which the force of friction does work on the block

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QUESTION 14 Two different sleds with sails attached to them are used in a race on a frictionless, horizontal stretch of ice. Both sleds (one of mass m, the other of mass 2m) start from rest, and the wind exerts the same constant force on both sails. Which sled crosses the finish line with more kinetic energy? O The sled of mass m; it has twice as much kinetic energy as the sled of mass 2m The sled of mass 2m; it has four times as much kinetic energy as the sled of mass m The sled of mass 2m; it has twice as much kinetic energy as the sled of mass m The sled of mass m; it has four times as much kinetic energy as the sled of mass 2m Both sleds cross the finish line with the same amount of kinetic energy

QUESTION 14 Two different sleds with sails attached to them are used in a race on a frictionless, horizontal stretch of ice. Both sleds (one of mass m, the other of mass 2m) start from rest, and the wind exerts the same constant force on both sails. Which sled crosses the finish line with more kinetic energy? O The sled of mass m; it has twice as much kinetic energy as the sled of mass 2m The sled of mass 2m; it has four times as much kinetic energy as the sled of mass m The sled of mass 2m; it has twice as much kinetic energy as the sled of mass m The sled of mass m; it has four times as much kinetic energy as the sled of mass 2m Both sleds cross the finish line with the same amount of kinetic energy

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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