science - forces and newtons laws

Question 1

define reference point

Answer 1

the starting point you choose to describe the location, or the position, of an object.

Question 2

define position

Answer 2

an object’s distance and direction from a reference point.

Question 3

define motion

Answer 3

the process of changing position.

Question 4

define displacement

Answer 4

the difference between the initial (first) position and the final position of an object.

Question 5

define speed

Answer 5

a measure of the distance an object travels per unit of time.

Question 6

define velocity

Answer 6

the speed and the direction of a moving object.

Question 7

define acceleration

Answer 7

a measure of the change in velocity during a period of time.

Question 8

define force

Answer 8

a push or a pull on an object.

Question 9

define contact force

Answer 9

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

Question 10

define non-contact force

Answer 10

a force that one object can apply to another object without touching.

Question 11

define mass

Answer 11

the amount matter in an object.

Question 12

define gravity

Answer 12

an attractive force that exists between all objects that have mass.

Question 13

define friction

Answer 13

a force that resists the motion of two surface’s that are touching.

Question 14

define a unbalanced force

Answer 14

forces acting on an object that combine and form a net force that is not zero.

Question 15

define a balanced force

Answer 15

forces acting on an object that combine and form a net force of zero.

Question 16

define newton’s 1st law of motion

Answer 16

law that states that if the net force acting on an object is zero, the motion of the object doesn’t change.

Question 17

define inertia

Answer 17

the tendency of an object to resists it’s change in motion.

Question 18

define net force

Answer 18

the combination of all forces acting on an object.

Question 19

define newton’s 2nd law of motion

Answer 19

law that states the acceleration of an object is equal to the net force exerted on the object divided by the objects mass.

Question 20

define centripetal force

Answer 20

in circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve.

Question 21

define newton’s 3rd law of motion

Answer 21

the law that states that for every action there is an equal and opposite reaction.

Question 22

define force pair

Answer 22

the forces two objects apply to each other.

Question 23

define momentum

Answer 23

a measure of how hard it is to stop a moving object.

Question 24

define law of conservation of momentum

Answer 24

a principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects.