newtons laws of motion and momentum

Question 1

what does it mean when an object is in equilibrium

Answer 1

not accelerating it is either stationary or moving at a constant velocity

Question 2

newtons third laws

Answer 2

every action has an equal and opposite reaction force

Question 3

newtons second law

Answer 3

resultant force of an object is proportional to the rate of change of momentum of the object and in the same direction, f = ma

Question 4

newtons first law

Answer 4

an object at rest or moving with constant velocity will stay that way unless a resultant force actions upon it

Question 5

elastic collision

Answer 5

the kinetic energy before is equal to the kinetic energy after, no energy is lost

Question 6

inelastic collision

Answer 6

the kinetic energy at the end is not equal to the kinetic energy at the start meaning some energy is lost to the surroundings

Question 7

equation used to calculate momentum

Answer 7

momentum = mass x velocity

Question 8

is linear momentum conserved in elastic collisions

Answer 8

no linear momentum is always conserved

Question 9

what can the rate of change of momentum be described as

Answer 9

resultant force

Question 10

impulse

Answer 10

the change in momentum, ft = mv

Question 11

what does the area underneath a force time graph stand for

Answer 11

impulse, the change in momentum

Question 12

principle of conservation of energy

Answer 12

energy cannot be created or destroyed only transferred into other forms of energy, means total energy in a closed system would always remain the same

Question 13

equation for principle of conservation of linear momentum

Answer 13

m1u1 + m2u2 = m1v1 + m2v2