Momentum & Impulse

Question 1

What is the definition of linear momentum?

Answer 1

Vector quantity equal to the product of the mass of the particle and its velocity.

Question 2

Which units of mass and velocity are used in the calculation of momentum?

Answer 2

For mass, kg is used
For velocity, m/s is used

Question 3

What is the first thing you should do when solving momentum problems?

Answer 3

Establish one direction as positive and the other as negative.
Velocity values will have a sign associated with their direction.

Question 4

What is the expression used for the change in momentum of an object?

Answer 4

change in p = final p - initial p

Question 5

What does the term stationary mean?

Answer 5

It means the object is not moving

Question 6

Define conservation of momentum in both word and equation form

Answer 6

Word: The total momentum of an isolated system is constant.
Equation: p(before) = p(after)

Question 7

How do you calculate the total momentum of a system?

Answer 7

Calculate the momentum of each object separately and add the momentum values at the end/

Question 8

Define impulse in both word and equation form.

Answer 8

Word: Impulse is the product of the net force and the time interval for which the force acts.
Equation: Impulse = F x t

Question 9

Define the impulse-momentum theorem.

Answer 9

Impulse = change in momentum

Question 10

What are the units of impulse?

Answer 10

N.s