A.2 - 12 - What is momentum?

What is the definition of momentum and its standard variable?

• The force required to move an object; F

• How difficult it is to make an object stop; p

• The energy an object possesses due to its motion; E

• The rate of change of velocity; a

Which two physical quantities primarily determine an object's momentum?

• Force and acceleration

• Mass and velocity

• Energy and time

• Distance and speed

What are the common units for momentum?

• Joules (J)

• Watts (W)

• Newton-seconds (Ns) or kilogram-meters per second (kg*m/s)

• Meters per second squared (m/s²)

What characteristic of momentum indicates it has both magnitude and direction?

• It is a scalar quantity.

• It is a vector quantity.

• It is a dimensionless quantity.

• It is always positive.