Section 1; Friction, Gravity and Momentum

Question 1

a force that can act on objects when they are in contact with one another

Answer 1

friction

Question 2

the force of friction between two objects moving against each other; requires motion; objects must slide against each other

Answer 2

kinetic friction

Question 3

occurs between two objects touching each other but not moving against each other; the force that prevents two objects from starting to movie

Answer 3

static friction

Question 4

an attractive force that acts to pull objects closer together

Answer 4

gravity

Question 5

gravity is inversely proportional to the square of the distance between two objects; as distance increases, gravity decreases and vice versa; gravity exists between any two objects in the universe; directly proportional to the mass; more mass more gravity

Answer 5

Newton’s Law of Universal Gravitation

Question 6

the mass of an object times its velocity

Answer 6

linear momentum

Question 7

scientific law that states that momentum is conserved when two or more objects collide

Answer 7

law of conservation of momentum

Question 8

the amount of bounce an object has after a collision

Answer 8

elasticity

Question 9

objects stick together; they collide and then proceed together on their trajectory

Answer 9

inelastic collision

Question 10

objects rebound off each other and proceed in new directions

Answer 10

elastic collision