Force & Motion

t

B A

Y

X

1. A ,y; ,Ue;J B ,w;F

nry;tjw;F A X B topNa tise;J nry;tJ JhukhFk;. mjhtJ “gazj;jpd; nkhj;j ePsk; Jhuk;” vdg;gLk;.

2.

A

Jhuk; topNa nry;Yk; NghJ jpir Fwpg;gpl;Lr; nrhy;y KbahJ.

3.

vdNt Jhuk; vz;ngWkjpia kl;LNk nfhz;lJ.

4.

,jdhy; Jhuk; gUkd; kl;Lk; nfhz;ljhy;“vz;zpf;fzpak;” MFk;.

A.R.Emil.

B

1.

A ,y; ,Ue;J B ,w;F nry;tjw;F A B topNa Neuhf nry;tJ ,lg;ngah;r;rp ahFk;. mjhtJ “gazj;jpd; ,ilj;Jhuk; ,lg;ngah;r;rp” MFk;.

2.

,lg;ngah;r;rpf;F Fwpg;gl;l jpir nrhy;y KbAk;.

3.

vdNt gUkDk; jpirAk; nfhz;ljhy; ,lg;ngah;r;rp “fhtpf;fzpak;” MFk;.

Science & Technology

1

1. 2.

Jhuk; khWk; tPjk; fjpahFk;. mjhtJ xU mirAk; nghUs; XuyF Neuj;jpy; nrd;w Jhuk; mg;nghUspd; fjpahFk;. 3. fjp vz;zpf;fzpak;. fjp = Jhuk; Neuk;. myF – m/s OR ms -1 OR kmh -1 cjhuzk;

- xU fhuhdJ 24m 24m Jhuj;ijf flf;f 4s 4s vLj;jJ. vdpd; mf; fhhpd; fjp ahJ? fjp

=

Jhuk; Neuk;. = 24m 4s

1. ,lg;ngah;r;rp khWk; tPjk; NtfkhFk;. 2. mjhtJ xU mirAk; nghUs; XuyF Neuj;jpy; mile;j ,lg;ngah;r;rp NtfkhFk;. 3. Ntfk; fhtpf; fzpak;. Ntfk; = ,lg;ngah;r;rp Neuk; myF - m/s OR ms-1 OR kmh-1 Q:-- A,B,C ,d; ,lg;ngah;rp ahJ? Q: t 5m

A

B 5m C

= 6ms-1 A.R.Emil.

5m

Science & Technology

2

Jhuk; (m)

0

5

10

15

20

25

Neuk; (s)

0

1

2

3

4

5

D i st en ce (m )

gapw;rp – 5 ms ms--1 Ntfj;jpy; nry;Yk; fhhpd; Ntfj;ij kmh--1 ,y; jUf. kmh gb1:-- m I km Mf khw;w gb1: 1000 My; gphpf;f Ntz;Lk;. gb1:-- s I kzpahf;f 3600 My; gb1: gphpf;f Ntz;Lk;.

30 20 10 0

MfNt :-:-

0

1

2

3

4

5 Time (s)

,q;F fjp tiugpd; gbj;jpwdhFk;. tiuG Y = mX Mf miktjhy; gbj;jpwd; m = Y / X MFk;. - 10 vdNt fjp = 15 03 - 02 = 5m 1s = 5 ms-1 A.R.Emil.

Science & Technology

3

Ntfj;ij Y mr;rpYk; Neuj;ij X mr;rpYk; Fwpj;J tiuag;gLk; tiuG ,JthFk;. ,q;F Neuk; khwk; NghJk; Ntfj;jpy; khw;wk; ,y;iy.

“Ntfk; khWk; tPjk; Mh;KLfyhFk;”. Ntf khw;wk; Mh;KLfy; = Neu khw;wk;

,q;F Neuk; khWk; NghJNtfk;$lyhk;

Ntfk;

5

5

5

5

5

5

5

Neuk;

0

1

2

3

4

5

6

my;yJ Fiwyhk;. ( myF ms- 2 ) Ntfk; $LtJ - Mh;KLfy;. Ntfk; FiwtJ - mkh;KLfy;. Ntfk;

0

1

2

3

4

5

6

Neuk s

0

5

10

15

20

25

30

Ntfk; ms-1

Ntfk; ms-1

rPuhd Mh;KLfy; 35 30 25 20

Neuk; s

15 10 5 0 0

A.R.Emil.

Science & Technology

1

2

3

4

5

6 Neuk; s

4

Mh;KLfy; =

mkh;KLfy; =

,WjpNtfk; - Muk;gNtfk; Neu khw;wk;

Muk;gNtfk; - ,WjpNtfk; Neu khw;wk;

rPuhd Ntfj;jpd; NghJ Mh;KLfy; G+r;rpak;

rPuhd Mh;KLfypd; NghJ Ntf mjpfhpg;G rPuhf mikAk;. A.R.Emil.

Science & Technology

5

Ntf-Neu tiugpd; gb ,aq;Fk; nghUs; gazk; nra;j Jhuk; tiuG X mr;Rld; mikf;Fk; gug;gpidf; fhz;gjd; %yk; ngwg;gLk;. Jhu-Neu tiugpd; gbj;jpwd; jUtJ – fjp ,lg;ngah;r;rp Neu tiugpd; gbj;jpwd; jUtJ – Ntfk;. Ntf-Neu tiugpd; gbj;jpwd; jUtJ Mh;KLfy; MFk; A.R.Emil.

Science & Technology

6

S

V

S

t

t

t Xa;T epiy

rPuhd Ntfk;

rPuhd Ntfk;

V

V

a

t

t rPuhd Mh;KLfy;

A.R.Emil.

t

rPuhd mkh;KLfy;

Science & Technology

rPuhd Mh;KLfy;

7

tpjp 1

- Gwtpirfs; jhf;fhj NghJ Xa;tpy; cs;s nghUs; njhlh;e;Jk; Xa;tpy; ,Uf;Fk; ,af;fj;jpy; cs;s nghUs; njhlh;e;Jk; ,aq;fpf; nfhz;bUf;Fk;. c -k;:- tpz;ntspapy; nghUs; xd;wpd; elj;ij.

tpjp 2

- ,aq;Fk; nghUspdJ jpzptpdJk; Mh;KLfypdJk; ngUf;fk; mjd; kPJ gpuNahfpf;fg;gLk; rkg;gLj;jg;glhj tpirf;Fr; rkdhFk;.

F = ma c -k;:- xUth; js;StjpYk; ghh;f;f gyh; js;Sk; NghJ ghwhq;fy; mirjy;. tpjp 3

- ve;jnthU jhf;fj;jjp;Fk; rkDk; vjpUkhd kW jhf;fk; cz;L. c -k;:- Nkirapy; ifahy; mbf;Fk; NghJ ifapy; Neh Vw;gly;.

A.R.Emil.

Science & Technology

8

gapw;rp :-

gpd;tUk; tiuig mbg;gilahff; nfhz;L fPNo Nfl;fg;gLk; Nfs;tpfSf;F tpil jUf.

Ntfk;16 ms-1 14 12 10 8 6 4 2 0 0

1

2

3

4

5

6

7

8

9

Neuk; s

1. tiufpd; gb ,af;fj;ij tpghpf;f. tpil 2. Mh;KLfSld; nrd;w Jhuk; ahJ? tpil 3. tz;bapd; Mh;KLfy; ahJ? tpil 4. tz;bapd; fuhrhpf; fjp ahJ?

tpil

5. 6 – 9 nrf;fd;fspy; Mh;KLfs; ahJ? tpil 6. tz;apd; cr;r Ntfj;ij km/h ,y; jUf.

tpil

7. Nkw;gb tiugpd; Jhu – Neu tiuig tiuf. A.R.Emil.

Science & Technology

tpil 9

1.

tz;b Xa;tpy; ,Ue;J gazj;ij Muk;gpj;J rPuhd Mh;KLfYld; 3 nrf;fd;fs; gazk; nra;J ngw;Wf;nfhz;l Ntfj;Jld; NkYk; 3 nrf;fd;fs; gazk; nra;J gpd;dh; rPuhd mkh;KLfYld; 9tJ nrf;fdpy; Xa;tilfpwJ.

2.

V-t tiugpd; gb Jhuk;

= = = = =

3.

Mh;KLfy; Lfy;

= = =

A.R.Emil.

tiugpdhy; X mr;Rld; milf;Fk; gug;G MFk;. Kf;Nfhzpapd; gug;G ½ X mb X nrq;Fj;Jauk;. ½ X 3 X15 m 22.5 m. ,WjpNtfk; - Muk;g Ntfk; Neu khw;wk; 15 – 0 3 5 ms-2

Science & Technology

10

4.

ruhrhpf; fjp

=

nkhj;jj; Jhuk;

= =

nkhj;j Neuk; / ruhrhpf; fjp

A.R.Emil.

= = = = = = =

nkhj;jj; Jhuk; nkhj;j Neuk; rhptfg; gug;gsT ½ (rkhe;jpug; gf;fq;fspd; $.njhif) X nrq;Fj;Jauk;. ½ X ( 9 + 3 ) X 15 ½ X 12 X 15 6 X 15 90 m 9 90/9 10 ms-1

Science & Technology

11

5.

Mh;KLfy;

=

,Wjp Ntfk; - Muk;g Ntfk; mjw;F vLj;j Neuk; = 0 – 15 3 = -15 3 = - 5 ms-2 Mh;Lfy; kiwg; ngWkjpapy; cs;sjhy; ,J mkh;KLfy; vdg;gLk;.

A.R.Emil.

Science & Technology

12

6.

myF khw;wk;

ms--1 ms

kmh--1 kmh = = =

A.R.Emil.

Science & Technology

15 X 3600 1000 15 X 3.6 54 kmh-1

13

7.

Jhu – Neu tiuG Jhuk; m 90.0 67.5

22.5

3

A.R.Emil.

6

9

Neuk; S

Science & Technology

14

gapr;rp:1. gpd;tUtdtw;Ws; NtWgl;l myiff; nfhz;l fzpak; vJ? i. Ntiy ii. tpir iii. tpirj;jpUg;gk; iv. rf;jp 2. Jhu-Neu tiugpd; gbj;jpwd; jUtJ i. Ntfk; ii. Mh;KLfy; iii. fjp 3. tpirapd; rh;tNjr myF 1. Nm 2. N 3. J

iv. Jhuk;

4. J/s

4. GtpaPh;g;G Mh;KLfypd; rhpahd myF 1. m/s-2 2. Nm 3. g 4. ms-2 5. 10ms-1 Ntfj;Jld; ,aq;fpa fhuhdJ 2ms-2 vDk; rPuhd mkh;KLfSld; ,aq;fp Xa;Tf;F te;jJ. jLg;G gpuNahfpf;fg;gl;l ,lj;jpy; ,Ue;J vt;tsT Jhuj;jpy; fhh; Xa;tilAk;? 1. 25m 2. 2.5m 3. 0.25m 4. 250m

A.R.Emil.

Science & Technology

15