Conservation of Linear Momentum

Front

What is the Law of Conservation of Momentum?

Back

The Law of Conservation of Momentum states that the total momentum of a closed system remains constant if no external forces act on it.

Front

Define momentum.

Back

Momentum (p) is the product of an object's mass (m) and its velocity (v), expressed as p = m x v.

Front

What happens to the velocity of the center of mass in the absence of external forces?

Back

The velocity of the center of mass remains constant unless acted upon by external forces.

Front

In a collision where two objects stick together, what is conserved?

Back

Momentum is conserved in a collision where two objects stick together.

Front

What is the formula for calculating average frictional force?

Back

Average frictional force (F_friction) can be calculated using F_friction = (m x (v_initial - v_final)) / time.

Front

If a carpenter throws a hammer, what can be said about the momentum of the carpenter and the hammer?

Back

The carpenter and the hammer will have equal and opposite momentum after the throw.

Front

What is the significance of external forces in the context of momentum?

Back

External forces can change the momentum of a system; without them, momentum is conserved.

Front

How do you calculate the final momentum of an object?

Back

Final momentum (p_f) can be calculated using p_f = m x v_f, where v_f is the final velocity.

Front

What is an example of a perfectly inelastic collision?

Back

A perfectly inelastic collision occurs when two objects collide and stick together, moving as one mass after the collision.

Front

What is the relationship between kinetic energy and momentum?

Back

Kinetic energy (KE) is related to momentum (p) by the equation KE = p^2 / (2m), showing that they are connected but not the same.