Momentum

Question 1

Is a measure of an object’s inertia of motion. Isaac Newton call this property of an object its “quantity of motion”

Answer 1

Momentum (p)

Question 2

The unit of momentum is

Answer 2

kg.m/s

Question 3

Momentum is a vector quantity and is always in the same direction as the object’s velocity vector

True or False

Answer 3

True

Question 4

is defined by the product p = mv

Answer 4

Linear momentum

Question 5

The sum of the unbalanced external forces on a system is equal to the time-rate of change of the momentum of the system

True or False

Answer 5

True

Question 6

An unbalanced force on an object does not change its momentum

True or False

Answer 6

False

Question 7

The product of a force and the time the force is exerted

Answer 7

Impulse (i)

Question 8

The change of momentum of a system is directly proportional to the force sum acting on it and the time interval during which the force is exposed

True or False

Answer 8

True

Question 9

The impulse of a net force on a system is not equal to the change in momentum of a system

True or False

Answer 9

False

Question 10

The magnitude and direction of the impulse vector is the same as the momentum difference vector

True or False

Answer 10

True

Question 11

Is the velocity given to one object within a system by other parts of the system

Answer 11

Recoil

Question 12

Internal forces do not change the overall momentum of a system – only external forces do

True or False

Answer 12

True

Question 13

Momentum of a system is observed when the net external force acting on a system is zero

True or False

Answer 13

True

Question 14

The momentum of a system is conserved unless an unbalanced internal force acts on a system

True or False

Answer 14

False (external force)

Question 15

In an elastic collision, only conservative forces act; therefore, total mechanical energy is conserved

True or False

Answer 15

True

Question 16

Internal nonconservative forces can change the kinetic energy of internal particles of a system as well as their momenta

True or False

Answer 16

True

Question 17

The momentum of the system is not conserved unless an unbalanced external force acts on a system

True or False

Answer 17

False

Question 18

Since no external force is exerted on the system, the momentum of the system must be the same

True or False

Answer 18

True

Question 19

In an elastic collision, only conservative forces act and both momentum and mechanical energy is conserved.

True or False

Answer 19

True

Question 20

In partially elastic collision one or more of the colliding masses is deformed, but the masses rebound away

True or False

Answer 20

True

Question 21

In inelastic collisions colliding masses stick together and do not conserve mechanical energy

True or False

Answer 21

True

Question 22

Internal, nonconservative forces cannot change the kinetic energy of internal particles of a system as well as their momenta.

True or False

Answer 22

False

Question 23

Ideally momentum is conserved within a system while kinetic energy is not

True or False

Answer 23

True

Question 24

In Inelastic collisions kinetic energy is not conserved

True or False

Answer 24

True

Question 25

An experimental device that depends on completely inelastic collisions is called

Answer 25

Ballistic pendulum

Question 26

Most collisions do not occur in two or three dimensions and momentum is not conserved in two or three-dimensional collisions True or False

Answer 26

False

Question 27

When two identical particle-like object collide elastically, the post-collision angle between the objects' paths is exactly 90 deg True or False

Answer 27

True

Question 28

Is the point in space where the mass of the entire system to be located for the purpose of determining the momentum of a system. Is proportionally closer the the parts of a multi-body system that has the greatest mass

Answer 28

Center of mass

Question 29

Momentum is a vector quantity that can be oriented in any direction True or False

Answer 29

True

Question 30

Mass moving in a circle is said to have

Answer 30

angular momentum

Question 31

Angular momentum is conserved unless an external force is applied to the rotating system True or False

Answer 31

True