motion and forces pt 2

Question 1

what force is measured in

Answer 1

newtons

Question 2

the total force that results from adding all of the individual forces acting on an object

Answer 2

net force

Question 3

forced acting in the same direction are _________ together

Answer 3

added

Question 4

forces acting in the opposite direction are ____________

Answer 4

subtracted

Question 5

force that oppose notion between two molecules that are touching

Answer 5

friction

Question 6

friction always acts in a direction _________ to motion

Answer 6

opposite

Question 7

name the 4 types of friction

Answer 7

1. ) rolling
2. ) sliding
3. ) fluid
4. ) static

Question 8

type of friction that occurs in liquids and gases

Answer 8

fluid

Question 9

type of friction that occurs between objects that are not moving

Answer 9

static

Question 10

substance applied to a surface in order to reduce friction

Answer 10

lubricant

Question 11

force of attraction between all objects

Answer 11

Gravity

Question 12

name the two rules of gravity

Answer 12

more mass=more gravity

farther=less gravity

Question 13

measure of the amount of matter in an object

Answer 13

mass

Question 14

does not change with location

Answer 14

mass

Question 15

measure of the force of gravity on an object

Answer 15

weight

Question 16

will change with location

Answer 16

weight

Question 17

objects accelerate toward the earth at what rate (g)?

Answer 17

9.8m/sec/sec

Question 18

air resistance _______ as speed increases

Answer 18

increases

Question 19

when the upward force of air resistance equals the downward force of gravity and the object stops accelerating. it does not stop falling

Answer 19

terminal velocity

Question 20

occurs when gravity is the only force acting on an object

Answer 20

free fall

Question 21

a curved part that an object follows when thrown near the surface of the earth

Answer 21

projectile motion

Question 22

name the two types of projectile motion

Answer 22

horizontal

vertical

Question 23

an object at rest will remain at rest and an object in motion will remain in motion( at a constant velocity, unless acted upon by an unbalanced force. also known as inertia

Answer 23

Newton’s first law

Question 24

the acceleration of an object depends on the mass of the object and the amount of force applied to the object

Answer 24

Newton’s second law

Question 25

for every action there is an equal and opposite reaction

Answer 25

Newton’s third law

Question 26

property of a moving object that depends on the object’s mass and velocity

Answer 26

momentum

Question 27

momentum can be __________ between objects

Answer 27

transferred

Question 28

if one object gains momentum, then other objects in the group must ______ an equal amount

Answer 28

lose

Question 29

the total momentum of the group remains the same unless acted upon by an __________ force

Answer 29

unbalanced

Question 30

a push or pull that gives energy to an object

Answer 30

force