force exam

Question 1

force

Answer 1

“push or pull” may cause an object to slow down, speed up, or change direction

Question 2

free body diagrams

Answer 2

shows all the forces acting on a object using vectors originating from the center of the object’s mass

Question 3

contact forces

Answer 3

2 objects must be touching
Ex: push, normal, pull, thrust, tension, friction

Question 4

field force / action at a distance forces

Answer 4

2 objects DON’T have to be touching
Ex: gravitational, electric, magnetic

Question 5

newton’s 1st law

Answer 5

object at rest remains in rest, object in motion continues in motion at a constant speed unless acted on by a non-zero net force

Question 6

what is newton’s 1st law also called?

Answer 6

law of inertia

Question 7

inertia

Answer 7

property of matter and doesn’t depend on position/location of the objects

Question 8

equilibrium

Answer 8

when all forces acting on an object are balanced
doesn’t mean forces are equal

Question 9

balanced forces

Answer 9

the rightward forces are balanced by the leftward forces and the upward forces are balanced by the downward

Question 10

unbalanced forces

Answer 10

the force applied in one direction is greater than the force applied in the opposite direction

Question 11

newton’s 2nd law

Answer 11

a net force causes an object to accelerate in the direction of the net force

Question 12

what is newton’s 2nd law also called

Answer 12

law of acceleration

Question 13

weight

Answer 13

force due to gravity
changes

Question 14

mass

Answer 14

anything made up of atoms
doesn’t change

Question 15

when mass goes up, the acceleration goes…

Answer 15

down

Question 16

net forces cause…

Answer 16

acceleration

Question 17

friction

Answer 17

when objects rub against each other

Question 18

force opposite of motion

Answer 18

friction

Question 19

newton’s 3rd law

Answer 19

for every action there is an equal force and opposite reaction

Question 20

what is newton’s 3rd law also called

Answer 20

law of interaction

Question 21

cause of motion is NOTHING
cause of constant velocity is NOTHING

Answer 21

inertia

Question 22

reaction force

Answer 22

a force that acts in the opposite direction to an action force

Question 23

action reaction pair

Answer 23

forces of equal magnitude and opposite direction that act on different object.

Question 24

zero net force

Answer 24

object is at rest or moving at a constant speed
forces are balanced

Question 25

Do newton’s 3rd law pair of forces cancel each other out?

Answer 25

NEVER

Question 26

as the mass gets bigger, force due to gravity gets…

Answer 26

bigger

Question 27

as the distance gets bigger, the force due to gravity gets…

Answer 27

smaller