How Does Force Affect Javelin Momentum and Speed?

Thread starter almost__overnow
Start date Oct 22, 2006
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Momentum

In summary, momentum is a physical quantity that describes an object's tendency to keep moving in the same direction at the same speed. It is important because it helps us understand the behavior of objects in motion and is conserved in a closed system. Momentum differs from velocity in that it takes into account an object's mass in addition to its speed and direction. It is closely related to Newton's laws of motion, specifically the law of inertia, and can be changed through the application of force or interactions with other objects.

Oct 22, 2006

almost__overnow

A 75kg javelin thrower applies a 300 N force to a 2.0kg javelin for 1.5 seconds.

a)what is the increase in momentum of the javelin?

b)what is the speed of the javelin immediately after the throw?

all i know is that ft = /\(mv) /\ is suppose to be a triangle.

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Oct 22, 2006

radou

Homework Helper

Look up the relation between change in momentum and impulse.

Oct 22, 2006

Office_Shredder

Staff Emeritus

Science Advisor

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Hint: the initial momentum is zero

FAQ: How Does Force Affect Javelin Momentum and Speed?

What is momentum?

Momentum is a physical quantity that describes an object's tendency to keep moving in the same direction at the same speed. It is calculated by multiplying an object's mass by its velocity.

Why is momentum important?

Momentum is important because it is a fundamental concept in physics that helps us understand the behavior of objects in motion. It is also a conserved quantity, meaning that in a closed system, the total momentum before and after an event will remain constant.

How is momentum different from velocity?

Velocity is a vector quantity that describes an object's speed and direction of motion. Momentum is also a vector quantity, but it takes into account the mass of an object in addition to its velocity. This means that two objects with the same velocity can have different momentums if they have different masses.

How does momentum relate to Newton's laws of motion?

Momentum is closely related to Newton's laws of motion, particularly the law of inertia. An object in motion will continue to move with the same velocity unless acted upon by an external force, which can change its momentum. Momentum also plays a role in the second and third laws of motion.

How can momentum be changed?

Momentum can be changed by applying a force to an object, which will result in a change in velocity. This can be seen in everyday situations, such as pushing a shopping cart or throwing a ball. Additionally, objects can also change momentum through interactions with other objects, such as collisions.