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 product of the average force applied to an object and the time duration over which it is applied, represented by the formula Impulse = F_avg * Δt.

Front

What is the relationship between force and momentum?

Back

The relationship is defined by Newton's second law, which states that the net force acting on an object is equal to the rate of change of its momentum.

Front

What is the formula for calculating change in momentum?

Back

Change in momentum (Δp) is calculated as Δp = p_final - p_initial.

Front

What does a graph of force vs. time represent in terms of momentum?

Back

The area under the force vs. time graph represents the impulse applied to the object, which equals the change in momentum.

Front

What is the significance of a variable net force?

Back

A variable net force means that the force applied to an object changes over time, affecting the object's acceleration and momentum differently at each moment.

Front

How do you determine the greatest change in momentum from a force vs. time graph?

Back

The greatest change in momentum occurs during the time interval where the area under the force vs. time graph is largest.

Front

What happens to momentum when an object experiences a constant force?

Back

When an object experiences a constant force, its momentum changes linearly over time, increasing or decreasing at a steady rate.

Front

What is the effect of friction on momentum?

Back

Friction opposes motion and can reduce the momentum of an object, affecting its speed and direction.