Newtons Laws

Question 1

contact force

Answer 1

a push or pull on an object by another object that is touching it

Question 2

force

Answer 2

a push or a pull on an object

Question 3

friction

Answer 3

force that resists the motion of two surfaces that are touching

Question 4

gravity

Answer 4

attractive force that exists between all objects that have mass

Question 5

mass

Answer 5

amount of matter in an object

Question 6

noncontact force

Answer 6

a force one object can apply to another object without touching it; e.g. the force of gravity and the electric and magnetic forces

Question 7

static friction

Answer 7

opposes motion; prevents surfaces from sliding past each other; increases as applied force increases

Question 8

sliding/kinetic friction

Answer 8

friction opposes motion between sliding surfaces; does not increase, so increasing the applied force makes objects slide faster

Question 9

fluid friction

Answer 9

occurs between a surface and materials like water and air; can result in air resistance

Question 10

weight

Answer 10

gravitational force exerted on an object

Question 11

balanced forces

Answer 11

combined forces form a net force of zero

Question 12

inertia

Answer 12

tendency of an object to resist a change in its motion

Question 13

net force

Answer 13

combination of all the forces acting on an object

Question 14

Newton’s 1st Law of Motion

Answer 14

an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force; also known as the Law of Inertia

Question 15

reference direction

Answer 15

measured from a starting point to describe an object’s position

Question 16

unbalanced forces

Answer 16

combined forces that form a net force that is not zero

Question 17

centripetal force

Answer 17

a force in circular motion that acts perpendicular to the direction of motion toward the center of the circle

Question 18

circular motion

Answer 18

any motion in which an object is moving along a curved path

Question 19

Newton’s 2nd Law of Motion

Answer 19

acceleration is equal to the net force exerted on the object divided by the object’s mass

Question 20

velocity formula

Answer 20

distance/time

Question 21

acceleration formula

Answer 21

(final velocity-initial velocity)/time

Question 22

acceleration units

Answer 22

m/s^2

Question 23

Formula for Weight

Answer 23

W=mg

Question 24

Newton’s 2nd Law of Motion formula

Answer 24

F=ma or a=F/m

Question 25

force pair

Answer 25

forces that two objects apply to each other

Question 26

Law of Conservation of Momentum

Answer 26

total momentum of a group of objects remains the same unless outside forces act on the objects

Question 27

momentum

Answer 27

measure of how hard it is to stop a moving object

Question 28

momentum formula

Answer 28

p=mv

Question 29

momentum units

Answer 29

kg(m/s)

Question 30

Newton’s 3rd Law of Motion

Answer 30

for every action there is an equal and opposite reaction

Question 31

Newton

Answer 31

unit of force

Question 32

1 N =

Answer 32

1 kg*m/s^2

Question 33

momentum units

Answer 33

kg*m/s

Question 34

The Universal Law of Gravitation

Answer 34

all objects are attracted to each other by a gravitational force; the strength of the force depends on the mass of each object and the distance between them

Question 35

elastic collision

Answer 35

colliding objects bounce off each other

Question 36

inelastic collision

Answer 36

colliding objects stick together