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- .SET #8(*3, *)
- .LET (*#34=#34+#8*) TEXT
- .LET (*#23=#23+#6*)
- @LAB:SCREEN34
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*34*)
- .LOC 5,11(* Newton's Laws continued *)
- .INV 5,11,25
- .PAU(**)#4
- .LOC 8,11(*Momentum (P) is the product of mass and velocity*)
- .LOC 10,31(*P = mv*)
- .PAU(**)#4
- .LOC 12,11(*Assuming that the mass remains constant:*)
- .PAU(**)#4
- .PUT 232,108 PART=20
- .LOC 15,34(*=*)
- .PUT 288,108 PART=15
- .LOC 15,39(*(mv)*)
- .PAU(**)#4
- .LOC 15,45(*= m.*)
- .PUT 392,108 PART=14
- .PAU(**)#4
- .LOC 15,54(*= ma*)
- .PAU(**)#4
- .LOC 18,11(*The rate of change of momentum of a body is the product of its*)
- .LOC 21,11(*mass and acceleration ...*)
- .PAU(**)#4
- .PUT 352,156 PART=20
- .LOC 21,49(*= ma*)
- .DRA(*BM340,152C1R94D25L94U25*)
- .SPE PLAY (*AM090115.SPE*) WAIT
- .PAU(**)#4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN35
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*35*)
- .LOC 5,11(*You will remember that NEWTON'S FIRST LAW stated:*)
- .INV 5,34,20
- .PAU(**)#4
- .LOC 7,15(*every body remains in a state of rest or uniform motion*)
- .LOC 9,15(*in a straight line unless acted on by an external force*)
- .PAU(**)#4
- .LOC 12,11(* NEWTON'S SECOND LAW connects the external force acting on*)
- .INV 12,11,21
- .LOC 14,11(*the body with the change in momentum:*)
- .PAU(**)#4
- .LOC 16,15(*the rate of change of momentum of a body is proportional*)
- .LOC 18,15(*to the externally applied force and it takes place along*)
- .LOC 20,20(*the line of action of that external force.*)
- .SPE PLAY (*AM090116.SPE*) WAIT
- .USE PROG=PAUSE.USE
- .WIP (4,2)-(23,79) #7
- .LOC 2,46(*35a*)
- .PAU(**)#2
- .LOC 16,11(*As an equation:*)
- .PAU(**)#4
- .LOC 16,35(*F*)
- .PUT 296,120 PART=21
- .PUT 323,116 PART=20
- .PAU(**)#4
- .LOC 16,50(*OR*)
- .PAU(**)#4
- .LOC 16,59(*F*)
- .PUT 488,120 PART=21
- .LOC 16,65(*ma*)
- .PAU(**)#4
- .LOC 19,20(*where:*)
- .LOC 19,30(*F is the external force m is the mass*)
- .LOC 21,30(*M is the momentum a is the acceleration*)
- .USE PROG=PAUSE.USE
- .WIP (4,2)-(23,79) #10
- .LOC 2,46(*35b*)
- .PAU(**)#2
- .LOC 13,11(*Replacing the proportionality sign,*)
- .PUT 366,96 PART=21
- .LOC 13,48(*, by a constant, k:*)
- .PAU(**)#4
- .LOC 16,35(*F = k.*)
- .PUT 339,116 PART=20
- .PAU(**)#4
- .LOC 16,50(*OR*)
- .PAU(**)#4
- .LOC 16,59(*F = kma*)
- .PAU(**)#4
- .LOC 19,14(*What value are we going to attribute to k and what does*)
- .LOC 21,22(*this mean for the unit of force for F ?*)
- .PAU(**)#4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN36
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*36*)
- .LOC 5,37(*F = kma*)
- .LOC 7,10(*Already we have fixed the unit of mass to be kilograms and the*)
- .LOC 9,13(*unit of acceleration to be metres per second per second.*)
- .PAU(**)#4
- .LOC 12,13(*By international agreement, k is chosen to equal 1 and we*)
- .LOC 14,15(*define the unit of force as the NEWTON symbol N*)
- .PAU(**)#4
- .LOC 17,30(*1 Newton = 1 kgms *)
- .PUT 393,127 PART=12
- .PAU(**)#4
- .LOC 20,13(*1 Newton would give a mass of 1 kilogram an acceleration*)
- .LOC 22,25(*of 1 metre per second per second.*)
- .SPE PLAY (*AM090117.SPE*) WAIT
- .PUT 500,187 PART=2 PSET
- @SIN(*"C"=L:SCREEN37,"c"=L:SCREEN37,"R"=L:-SCREEN34,"r"=L:-SCREEN34*)
- @LAB:SCREEN37
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*37*)
- .LOC 5,11(*An example:*)
- .PAU(**)#4
- .LOC 7,15(*If a force of 20 N is applied to a body of mass 5 kg,*)
- .LOC 9,15(*what is the acceleration of the body ?*)
- .USE PROG=PAUSE.USE
- .LOC 12,15(*By Newton's Second Law F = ma*)
- .PAU(**)#4
- .LOC 14,44(*20 = 5 x a*)
- .PAU(**)#4
- .LOC 16,36(*ยป*)
- .LOC 16,45(*a = 4*)
- .PAU(**)#4
- .LOC 18,30(*Acceleration is 4 ms *)
- .PUT 401,135 PART=12
- .DRA (*C1BM232,144M415,144*)
- .PAU(**)#4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN38
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*38*)
- .LOC 5,13(* NEWTON'S THIRD LAW comes from the observation of bodies*)
- .INV 5,13,20
- .LOC 7,13(*exerting forces on one another:*)
- .PAU(**)#4
- .PUT 104,64 PART=7
- .PUT 304,64 PART=7
- .DRA (*C1BM100,80M131,80NH2NG2BM332,80M301,80NE2NF2*)
- .LOC 9,49(*balls roll towards each other*)
- .MOV (104,96)-(179,96) STEPS=75
- .MOV (304,96)-(204,96) STEPS=100
- .LOC 13,49(*collide*)
- .PAU(**)#2
- .LOC 17,49(*balls roll away from each other*)
- .MOV (179,128)-(104,128) STEPS=75
- .MOV (204,128)-(304,128) STEPS=100
- .DRA (*C1BM132,124M100,124NE2NF2BM300,124M331,124NH2NG2*)
- .SPE PLAY (*AM090118.SPE*) WAIT
- .PAU(**)#4
- .PUT 104,156 PART=8
- .LOC 22,21(*Earth*)
- .DRA (*C1BM153,166M210,166NH2NG2*)
- .PUT 289,161 PART=7
- .LOC 22,41(*Moon*)
- .DRA (*C1BM288,166M250,166NE2NF2*)
- .LOC 21,49(*exert a gravitational*)
- .LOC 22,49(*attraction to each other*)
- .USE PROG=PAUSE.USE
- .LOC 11,13(* *)
- .WIP (4,2)-(23,79) #7
- .LOC 2,46(*38a*)
- .PAU(**)#2
- .DRA(*BM160,140C1R56D16L56U16*)
- .LOC 19,23(*Box*)
- .DRA(*C1BM100,184U27R176D27L16U20L144D20L16*)
- .PAI CENTRE=(108,180) COLOUR=1 BOUND=1
- .LOC 22,22(*Table*)
- .LOC 18,49(*the box exerts a downward*)
- .LOC 19,49(*force upon the table ...*)
- .PAU(**)#2
- .LOC 21,49(*the table exerts an*)
- .LOC 22,49(*upward force upon the box*)
- .PAU(**)#4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN39
- .SCR 0
- .SNA(*(.INF 39)0*)
- .COL 7,0
- .LOC 2,46(*39*)
- .COL 12,0
- .LOC 6,11(*NEWTON'S THIRD LAW*)
- .COL 14,0
- .LOC 6,31(*states:*)
- .COL 11,0
- .LOC 9,20(*Action and Reaction are equal and opposite*)
- .SPE PLAY (*AM090119.SPE*) WAIT
- .PAU(**)#4
- .COL 10,0
- .LOC 13,11(*This means that when two bodies exert a force upon each other*)
- .LOC 15,13(*then these forces are*)
- .COL 12,0
- .LOC 15,36(*EQUAL*)
- .COL 10,0
- .LOC 15,43(*and*)
- .COL 12,0
- .LOC 15,48(*OPPOSITE IN DIRECTION*)
- .PAU(**)#4
- .COL 14,0
- .LOC 18,11(*The two balls exert equal and opposite forces upon each other*)
- .PAU(**)#4
- .LOC 20,9(*The Earth and Moon exert equal and opposite forces on each other*)
- .PAU(**)#4
- .LOC 22,8(*The box and the table exert equal and opposite forces on each other*)
- .COL 0,3
- .LOC 24,64(*C / R >>*)
- @SIN(*"C"=L:SCREEN40,"c"=L:SCREEN40,"R"=L:-SCREEN38,"r"=L:-SCREEN38*)
- @LAB:SCREEN40
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*40*)
- .LOC 5,13(*Gravitational Force*)
- .DRA(*BM84,28C1R172D15L172U15*)
- .PAU(**)#4
- .LOC 8,10(*By simple observation, we know that any body released above the*)
- .LOC 10,10(*Earth falls to the Earth under the force which we call GRAVITY*)
- .PAU(**)#4
- .LOC 13,11(*In our earlier example, the Moon does not do this because it is*)
- .LOC 15,12(*in an orbit and the gravitational force maintains this orbit*)
- .LOC 17,12(*rather than the Moon flying off into space. [ Module 8.5 ]*)
- .PAU(**)#4
- .LOC 20,11(*The acceleration due to this gravitational force at sea-level*)
- .LOC 22,15(*has been measured and it is approximately 9.81 ms *)
- .PUT 521,167 PART=12
- .SPE PLAY (*AM090120.SPE*) WAIT
- .PAU(**)#4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN41
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*41*)
- .LOC 7,5(*At this point in the full version*)
- .LOC 9,9(*of the program the user is*)
- .LOC 11,5(*requested to complete a worksheet*)
- .LOC 13,6(*for this section, entering the*)
- .LOC 15,7(*results via the keyboard onto*)
- .LOC 17,9(*the computer for checking.*)
- .PAU(**)#4
- .LOC 19,6(*Type C <enter> to continue.*)
- .SET #10(*SCREEN42*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN42
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*42*)
- .LOC 6,4(*However, in this demonstration the*)
- .LOC 8,7(*results checking facility is*)
- .LOC 10,4(*unavailable, so you will continue to*)
- .LOC 12,6(*the next phase of the tutorial.*)
- .PAU(**)#4
- .LOC 18,6(*Type C <enter> to continue.*)
- .SET #10(*SCREEN43Z*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN43Z
- .WIP (20,2)-(23,39)
- .PAU(**) #4
- .COL 1,
- .LOC 14,8(*Do you wish to:*)
- .COL 2,
- .LOC 16,4(*(C) continue to the next Part*)
- .LOC 18,4(*(R) return to the Contents page*)
- .COL 1,
- .LOC 20,8(*Please type C or R >*)
- .COL 3,
- @SIN (*"C"=C:AM0901E.CHA,"c"=C:AM0901E.CHA,"R"=L:BACKB,"r"=L:BACKB*)
- @LAB:BACKB
- @GOB:SCREEN09 PROG=AM0901
-
-