5.2 Representations of Changes in Momentum

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv, where p is momentum, m is mass, and v is velocity.

Front

How does a net force affect momentum?

Back

A net force applied to an object causes a change in its momentum over time, as described by the impulse-momentum theorem: Impulse = Change in Momentum.

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as Impulse = Force × Time.

Front

What is the relationship between force and acceleration?

Back

According to Newton's second law, the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

Front

What does a graph of force vs. time represent?

Back

A graph of force vs. time shows how the applied force changes over time, which can be used to calculate the impulse and resulting change in momentum.

Front

What is the formula for calculating change in momentum?

Back

Change in momentum (Δp) can be calculated using the formula Δp = p_final - p_initial.

Front

How do you calculate the final velocity of an object given initial velocity and acceleration?

Back

Final velocity (v_final) can be calculated using the formula v_final = v_initial + (a × t), where a is acceleration and t is time.

Front

What is the significance of the direction of force in momentum changes?

Back

The direction of the applied force determines whether the momentum of the object increases or decreases; a force in the same direction increases momentum, while a force in the opposite direction decreases it.

Front

What is a variable net force?

Back

A variable net force is a force that changes in magnitude and/or direction over time, affecting the acceleration and momentum of an object.

Front

How does mass affect momentum?

Back

An increase in mass results in a greater momentum for the same velocity, as momentum is directly proportional to mass (p = mv).