momentum

Question 1

linear momentum

Answer 1

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

Question 2

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

Answer 2

closed system

Question 3

conservation of momentum

Answer 3

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

Question 4

perfectly elastic collision

Answer 4

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

Question 5

inelastic collision

Answer 5

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

Question 6

Newton’s first law of motion

Answer 6

an object remains at rest or travels at constant velocity unless it is acted on by a resultant force.

Question 7

Newton’s 2nd law of motion

Answer 7

the resultant force on a body is proportional to the rate of change of momentum of the body

Question 8

Newton’s 3rd law of motion

Answer 8

when body A produces a force on body B produces an equal and opposite force on body A