ese

Question 1

vector quantity

Answer 1

quantity with magnitude and direction

Question 2

scalar quantity

Answer 2

quantity with only magnitude

Question 3

inertia

Answer 3

an object’s tendency to remain in its original motion

Question 4

newton’s first law of motion

Answer 4

an object moves with a velocity that is constant in magnitude and direction unless a nonzero force acts on it

Question 5

newton’s second law

Answer 5

the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to the mass

Question 6

newton’s universal law of gravitation

Answer 6

every particle in the universe attracts every other particle in the universe with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them

Question 7

newton’s third law

Answer 7

if object two and object one are interacting, the force exerted on object two by object one is equal in magnitude but opposite in direction to the force exerted on object 1 by object 2

Question 8

conservative forces

Answer 8

a force is conservative if the work it does on an object to move it between two points is the same regardless of the path taken

Question 9

non-conservative forces

Answer 9

forces that ted to randomly disperse the energy of the object upon which it is acting

Question 10

linear momentum

Answer 10

the linear momentum of an object that has a mass and is moving with a velocity is the product of its mass and its velocity

Question 11

impulse

Answer 11

if a constant force is acting on an object, then the impulse delivered to the object in a certain time interval is equal to I=ft

Question 12

law of conservation of momentum

Answer 12

when no net external forces act in an object, the total momentum of the system remains constant over time

Question 13

elastic collision

Answer 13

one in which both kinetic energy and momentum are conserved

Question 14

inelastic collision

Answer 14

one in which momentum is conserved but kinetic energy is not

Question 15

perfectly inelastic collision

Answer 15

occurs when two object collide and stick together, and move with a constant velocity, momentum is conserved but kinetic energy is not

Question 16

torque

Answer 16

let f be a force that is acting on an object, and let r be a position vector from a chosen point of origin to the point of the applies force, with f being perpendicular to r.