Chap 2 force & motion

momentum

CONCEPT OF MOMENTUM

TOTAL MOMENTUMBEFORE COLLISION

= TOTAL MOMENTUMAFTER COLLISION

- VE (VELOCITY)

+ VE (VELOCITY)

MOTION PRINCIPLE

-

-

CONCLUSION…..

ELASTIC COLLISION

m1 m2 m2m1

u1 v2v1u2

m1u1 + m2u2 m1v1 + m2v2=

M1u1 + m2u2 M1v1 + m2v2=

=

22 9 + 2v=

=

m1 m2 m2m1

u1 u2 v

m1u1 + m2u2 (m1 + m2)v=

M1u1 + m2u2 =

=

(m1 + m2)v

=

24 5v=

1

2

3

4

Handout

M1u1 + m2u2 M1v1 + m2v2=

=

2 - 9 + 2v2=

=

=

=

M1u1 + m2u2 = (m1 + m2)v

EXPLOSION

CHANGE THE SHAPE

CHANGE ORIGINAL

STATE

???????????

EXP:

A FORCE OF 10N ACTS ON ANOBJECT OF MASS 5KG ON A SMOOTH FLOOR. FIND ITS ACCELERATION

F=10N a= ?

F = ma10 = 5a

a = 2 ms-2

1

2

FIND THE TENSION AND THEACCELERATION

1

W

T

W

T

FIND THE TENSION AND THEACCELERATION

2 LET’STRY