P2.3

Question 1

how do you change the shape of an object?

Answer 1

by using more than one force

Question 2

plastic material

Answer 2

a material does not return to its original shape when the forces are removed

Question 3

elastic material

Answer 3

material returns to its original shape when the forces are removed

Question 4

hookes law

Answer 4

extension of a spring is directly proportional to the force applied

Question 5

limit of proportionality

Answer 5

point on a force extension graph where force and extension stop having a linear relationship

Question 6

elastic limit

Answer 6

point at which the spring will no longer go back to its original length

Question 7

equation for force

Answer 7

force= spring constant x extension

Question 8

what is spring constant measured in?

Answer 8

N/m

Question 9

mass

Answer 9

how much of something there is

Question 10

weight

Answer 10

how much force is exerted due to gravity

Question 11

what is weight measured in?

Answer 11

Newtons

Question 12

equation for weight

Answer 12

weight= mass x gravitational strength

Question 13

what is gravitational strength measured in?

Answer 13

N/Kg

Question 14

gravity

Answer 14

causes a pulling force between you and the planet you are on

Question 15

how does mass affect gravity?

Answer 15

the larger the mass of either object, the larger the force due to gravity

Question 16

how does separation affect gravity?

Answer 16

the closer the objects are, the larger the force due to gravity

Question 17

spring constant

Answer 17

tells us how much force is required for a 1m extension

Question 18

what does a high spring constant mean?

Answer 18

tells us a large force is needed to extend a spring by 1m so it’s a stiff spring

Question 19

equation for energy transferred in stretching a spring

Answer 19

energy transferred in stretching a spring = 0.5 x spring constant x extension^2