Chap Resources 03

Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. Directions: Class Date Directions: Name provided. 7. 6. 5. 4. 3. 2. 1. weightlifter use to raise the barbell? the raise to use weightlifter What are the three types of friction and when does each apply? each does when and friction of types three the Whatare object? an of acceleration of rate the affect factorsWhat two NewtonWhatdoes partner? the of mass the Whatis N. 200 of force m/s 2.5 of acceleration an with head abovehis partner his lifts dancer A m/s 3 of acceleration an with barbell 200-kg a raises weightlifter A swimmer the will rate what at wall? the fromaccelerate N, 250 forceof a with wall pool a off pushes swimmer 70-kg a If m/s 3 of rate a at car 1000-kg a accelerate to needed is force much How 1 1 Answer the following questions on the lines provided. lines the on questions following the Answer equation the Use Reinforcement ’ s second law of motion state? motion of lawsecond s F = m = F ✕ a to solve the following problems. Show your calculations in the spaces the in calculations your Show problems. following the solve to Newton’s Second Law Second Newton’s 2 . How much force does the Howforcedoes much . 2 2 ? .The dancer exerts a Forces

27 MeetingNeeds IndividualIndividual NeedsMeeting 28 Class Directions: Date Directions: Name 7. 6. 5. 4. 3. 2. 1. Explain how you know the car is accelerating when it reaches point A in the first diagram. first the in A point reaches it when accelerating is car the knowyouhow Explain overcomecar to the enough not is car and road the of force centripetal the if car the movementof the showto diagram bottom the on arrow an Draw roadway?a in curve sharp a movearoundto car a allows forcethat centripetal the Whatis Explain. Moon? the on N 40 than more weigh it would Earth, on N 40 weighs object an If Moon? the forcethan gravitational stronger a exert WhyEarth does on? depends objects two forcebetween gravitational of amount the that things twoWhatare gravity? Whatis Forces 2 2 Icy road Dry road Use the diagrams below to complete the following questions. following the complete to below diagrams the Use provided. lines the on questions following the Answer Reinforcement Gravity ’ s inertia when it reaches point B. point reaches it when inertia s B A

Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc. Directions: Class Date Directions: Name 8. 7. 6. 5. 4. 3. 2. 1. Which truck has more momentum?Why? more has Which truck m/s? 10 movesat that truck 2000-kg a of momentum the Whatis m/s? 10 movesat that toytruck 2-kg a of momentum the Whatis Explain. backward? cannon the move will force much how N, 500 is forward cannonball the propels that force the If force?reaction a forceor action representan B Figure on drewyouarrows the Do force?reaction a forceor action representan FigureA on drewyouarrow the Does forward. boat the propelmoveto must oars the direction the showto B Figure on arrowsDraw fired. is cannonball the movewhen will cannon the direction the showto FigureA on arrow an Draw 3 3 Figure A Solve the following problems. following the Solve questions. following the answer to illustrations the Use Reinforcement The Third Law of Motion of Law Third The Figure B Forces

29 MeetingNeeds IndividualIndividual NeedsMeeting 30 It curve? Whyit does curve. indeed, does, it threwCummingslike thrown baseball a that all for provedand once (MIT) Technology of Institute Massachusetts did. it likelooked just or curved really ball the whether sure catcher the in land to batter the past fly and archto it caused This ball. the released Class he when moment exact the at wrist his snapped Cummings performance, historical ball Curve? Really It Did Date Arthur named pitcher Name People couldn People curve. them make could he way certain a in shells the releasing and holding by that found and baseball a of instead shells clam threw He home. NewEngland his near beach the on pitching his practiced and lovedbaseball Cummings boy,a As before. manyyearstechnique inventedactually his he 1867, Excelsiorsin Brooklyn the for pitching while game a during ball curve the threw first Cummings Although 3. 2. 1. oeta 0 er ae n18,the 1982, in later years 100 than More title the given was He younginventeda was by ball curve The Describe how the type of spin given to a baseball by a pitcher influences the path of the baseball. the of path the influencespitcher a by baseball a togiven spin of type the how Describe Explain. plain? flat a on down or mountain high a of top the at better curves baseball a think you Do baseball? a of path the haveon baseball a on stitches the might Whateffect ” Forces 1 1 by the Baseball Hall of Fame. In his his In Fame. of Hall Baseball the by Enrichment ’ t believe it. Nobody knew for Nobodyknew it. believe t ’ s all about friction. about all s “ Candy “ inventor of the curve the inventorof ” Cummings. Friction and the Curve Ball Curve the and Friction ’ s mitt. s muto rcin downward. friction: of amount least towardthe curves ball the ball, anycurve Like friction). (less air the as direction same the movein bottom the and friction) (more air the against move forward ball the of top the making wristwhen the ball is released causes a top spin, friction. of amount least the toward moving ball the fromresults path curved A less. experience ball the of parts and friction air more experience ball the of parts thrown, it After ball. the and air the between friction the changes spin that And ball. the on spin pitcher the of action snap The the left, or away from a right handed hitter.handed right awaya from or left, the andriencesthe ball curvesless airto friction, expe- baseball the of side right The clockwise. counter-spins ball the pitcher right-handed a bythrown is curveball Whena spin. clockwise a or counter-clockwisespin a produce also Sideways It Spin left-handed batters. left-handed awayfrom or right, the to curves ball the and friction, air less experiences baseball the of side left The clockwise. spins ball the pitcher, Specifically, one movement of the pitcher the movementof one Specifically, In addition to topspin, a pitcher a topspin, to addition In When a curveball is thrown by a left-handed a by thrown is curveball a When ’ s wrist puts a puts wrist s ’ s wrist can wrist s ’ s ’ s