Forces

Question 1

Force

Answer 1

something with the capability to cause a change in motion of a system
push/pull

Question 2

properties of a force

Answer 2

magnitude
point of application
direction

Question 3

direction

Answer 3

way the force is applied

Question 4

magnitude

Answer 4

size of the applied force

Question 5

point of application

Answer 5

point at which the system receives the applied force

Question 6

line of action

Answer 6

imaginary line extending indefinitely along the vector through the tip and tail

Question 7

types of forces

Answer 7

contact/non-contact
action/reaction
external/internal
motive/resistive

Question 8

contact force

Answer 8

the result of physical contact between 2 bodies

Question 9

non-contact forces

Answer 9

newton’s lay of universal gravitation explains the interaction of objects even when they are not in contact
attraction force between bodies of mass

Question 10

action forces

Answer 10

initially applied force

Question 11

reaction forces

Answer 11

the simultaneous equal counterforce acting in the opposite direction to the action force

Question 12

external forces

Answer 12

interact with the system from the outside
only external forces can change the motion of the system

Question 13

internal forces

Answer 13

act within the defined system
only internal forces can change the shape of the system

Question 14

motive force

Answer 14

a force that tends to lead to a change in motion in the form of increased velocity or change in direction of the system

Question 15

resistive forces

Answer 15

tends to prevent changes in motion by other external forces or decrease the velocity of a system that is already in motion

Question 16

gravity

Answer 16

pulls on an object’s mass with a certain amount of force
gravitational pull is concentrated at the center of mass

Question 17

weigth

Answer 17

measure of the force with which gravity pulls upon an object’s mass

Question 18

friction

Answer 18

force that resists the sliding of 2 objects in contact
exists when 2 objects are in contact and have a potential of sliding across each other

Question 19

static friction

Answer 19

when 2 contacting surfaces are not currently sliding relative to each other but do possess the potential for movement

Question 20

kinetic friction

Answer 20

when the 2 contacting surfaces are already sliding relative to each other

Question 21

rolling friction

Answer 21

when one surface is rolling over another but not sliding

Question 22

vector composition

Answer 22

situation where multiple force act upon a system and want to find the resultant force vector

Question 23

complexity of vector composition depends on

Answer 23

number of vectors
relative directions and orientations of the vectors

Question 24

vector resolution

Answer 24

process used to resolve a single vector into its individual directional component vectors