Inertia and Momentum

Things to remember

• Inertia is the property of a body due to which it remains or tends to remain in the state of rest are uniform motion in a straight line unless an unbalanced forces act on it.
• Inertia of rest is the property of the body by virtue of which it remains or tends to remain in the state of rest unless unbalanced force acts on it.
• Inertia of motion is the property of a body by virtue of which it remains are tends to remain in the state of uniform motion in a straight line unless unbalanced forces act on it.
• Inertia of direction is the property of a body by virtue of which it maintains or tends to maintain its direction of motion unless unbalanced forces act on it.
• Momentum is the product of mass and velocity. 
• Momentum is a vector quantity.