unit 1

Question 1

newtons 1st law

Answer 1

if ef of an object is zero the object will either remain stationary or if already moving continues to move with uniform motion

Question 2

newtons 2nd law

Answer 2

rate of change of m momentum is directly proportional to applied force and occurs in the same direction as the force

Question 3

newtons 3rd law

Answer 3

if object a exerts a force of object b the object a will exert an equal but opposite force

Question 4

conservation of momentum

Answer 4

the total momentum of a system of interaction bodies is constant if no external resultant force acts upon it
total m before
= total m after

Question 5

internal engird broken down

Answer 5

sum of ke and pe

Question 6

spring constant

Answer 6

force per unit extension

Question 7

stress

Answer 7

force per unit area

Question 8

strain

Answer 8

extension. per unit length

Question 9

Youngs modulus

Answer 9

stress/ strain

Question 10

crystalline

Answer 10

short and long range order regular pattern

Question 11

amorphous

Answer 11

little no long or short range

Question 12

polymeric

Answer 12

chains or

Question 13

hookes law

Answer 13

force directly proportional to extension

Question 14

intensity Stefan

Answer 14

I = p 4 pi x 2

Question 15

quarks

Answer 15

u d form groups eg baryons mesons

Question 16

lepton

Answer 16

electron

Question 17

baryons

Answer 17

group of three proton neutron