P2.3 - Springs And Gravitational Fields

Question 1

Plastics

Answer 1

A material that doesn’t return to its original shape after you apply and remove a force

Question 2

Elastics

Answer 2

A material that returns to its original shape after you apply and remove a force

Question 3

Hooke’s law

Answer 3

The extension of a spring is directly proportional to the force until you reach the limit of proportionality

Question 4

Force -extension graphs have

Answer 4

A linear relationship

Question 5

Limit of proportionality

Answer 5

When gradient is straight line up to this point

Question 6

Elastic limit

Answer 6

Above elastic limit material does not return to original length - permanently deformed

Question 7

Hooke’s law equation

Answer 7

Force (N) = spring constant (N/m) * extension (m)

Question 8

Spring constant

Answer 8

How difficult it is to stretch the spring or how stiff

Question 9

Energy transferred to stretch spring equation

Answer 9

E (J) = 0.5 * k(N/m) * e^2 (m)

Question 10

What is a gravitational field

Answer 10

A region where a mass experiences an attractive force

Question 11

Gravity equation

Answer 11

Gravity force (N) or Weight (N) = mass (kg) * grav field (N/kg)

Question 12

Acc and resultant equation

Answer 12

Resultant force (N) = mass (kg) * acceleration of gravity (m/s2)

Question 13

Weight equation

Answer 13

Weight (N) = mass (kg) * grav field (N/kg)

Question 14

GPE equation

Answer 14

GPE (J) = mass (kg) * height (m) * grav field (N/kg)

Question 15

W = F *d is same as

Answer 15

EPE = (mg) (h)

Question 16

When things fall

Answer 16

Energy is transferred from stores : GPE to KE

Question 17

Grav field strength of Earth

Answer 17

10N/kg

Question 18

Grav field strength of moon

Answer 18

1.6 N/kg

Question 19

Momentum has two equations

Answer 19

Mass * velocity
Force * time