Chapter 19

Question 0

net force

Answer 0

combination of all forces acting on an object

Question 1

force

Answer 1

a push or pull

Question 2

balanced forces

Answer 2

two or more forces whose effects cancel each other out and do not change the motion of an object

Question 3

unbalanced forces

Answer 3

two or more forces acting on an object that do not cancel and cause the object to accelerate

Question 4

Newton’s first law of motion

Answer 4

states that if the net force acting on object is zero, the object will remain at rest or move in a straight line with a constant time

Question 5

friction

Answer 5

force that acts to oppose sliding between two surfaces that are touching

Question 6

Newton’s second law of motion

Answer 6

states that an object acted upon by a net force will accelerate in the direction of the force, and that the acceleration equals the net force divided by the object’s time

Question 7

weight

Answer 7

gravitational force between an object and Earth

Question 8

center of mass

Answer 8

point in a object that moves as if all of the object’s mass were concentrated at that point

Question 9

Newton’s Third Law of Motion

Answer 9

For every action, there is an equal but opposite reaction; force acts in equal but opposite pairs