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What is the difference between linear momentum and impulse?

Question

What is the difference between linear momentum and impulse?

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Solution

Linear momentum and impulse are both fundamental concepts in physics, but they represent different things.

  1. Linear Momentum: Linear momentum, often simply referred to as momentum, is a vector quantity defined as the product of an object's mass and its velocity. In other words, momentum describes the quantity of motion an object has. For example, a heavy truck moving fast has a large momentum, and so does a fast baseball - it takes a force to change the motion of the object. The formula for linear momentum (p) is p = mv, where m is the mass of the object and v is its velocity.

  2. Impulse: Impulse, on the other hand, is the change in momentum of an object when a force is applied over a period of time. It's also a vector quantity and can be calculated by multiplying the force (F) acting on the object by the time (t) the force was acting: Impulse (J) = Ft. Impulse can also be calculated as the change in momentum, or final momentum minus initial momentum.

So, the main difference between linear momentum and impulse is that linear momentum is a measure of an object's motion at a snapshot in time, while impulse is a measure of the change in an object's momentum due to a force applied over a time period.

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Momentum versus pulse  |  ProblemWhat is the difference between linear momentum and impulse? Group of answer choicesLinear momentum is the sum of mass and velocity. Impulse is the change in linear momentum.Linear momentum is the sum of mass and velocity. Impulse is the rate of change in linear momentum.Linear momentum is the product of mass and velocity. Impulse is the change in linear momentum.Linear momentum is the product of mass and velocity.  Impulse is the rate of change in linear momentum.

What is the key idea behind impulse? 2 marksFor a change in momentum to happen, the mass has to be changed or velocity has to be changed For the same change in momentum, force can be increased to increase the force For a change in momentum to happen, the time has to be increased and the force has to be decreased  For the same change in momentum, time can be increased to decrease the force

Impulse is defined as change in *1 pointKinetic energyLinear momentumLinear velocityAcceleration

The impulse experienced by a body is equal to*1 pointchange in velocity of the objectchange in momentum of the objectthe force applied to the objectchange in mass of the object

The equation below shows the mathematical representation of the external impulse acting on a system, which is a vector quantity—resulting in (and equal to) the change in the system's linear momentum—caused by a net external force exerted over a time interval.  Match each term in the equation with the correct description from this list: (1) Change in Time; (2) Net Sum; (3) External Force; (4) Change in Linear Momentum; (5) Impulse

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