Momentum

Question 1

Linear momentum definition

Answer 1

the linear momentum of a body is the product of its mass and velocity

Question 2

Linear momentum formula,

in words

in symbols

Answer 2

momentum = mass x velocity

p = mv

Question 3

Closed system definition

Answer 3

a system of interacting objects in which there are no external forces

Question 4

Conservation of momentum definition

Answer 4

the sum or total momentum of the bodies in a closed system is constant provided no resultant force acts

Question 5

Perfectly elastic collision definition

Answer 5

in a perfectly elastic collision, the total kinetic energy of all the bodies remains constant

Question 6

Inelastic collision

Answer 6

in an inelastic collision, kinetic energy is not conserved some is transferred to other forms such as heat

Question 7

Key idea of perfectly elastic collisions

Answer 7

in a perfectly elastic collision of 2 bodies, the relative speed of the body’s approach is equal to the relative speed of their seperation

Question 8

Key idea of inelastic collisions

Answer 8

during an inelastic collision, the total kinetic energy of the bodies become smaller

Question 9

Resultant force equation,

in words

in symbols

Answer 9

Resultant force is proportional to rate of change of momentum

F = ∆p / ∆t