What is the Relationship Between the Two Impulses in a Vertical Jump?

AI Thread Summary
In a countermovement jump, two key impulses occur: one when the jumper crouches down and another upon landing. The relationship between these impulses can be understood by comparing the take-off and landing phases, which exhibit equal speeds and momenta, but in opposite directions. The discussion emphasizes that the take-off impulse is often overlooked when analyzing the jump dynamics. A graph could potentially illustrate these impulses over time, though the original poster lacks a physics background. Understanding these impulses is crucial for analyzing vertical jump mechanics effectively.
gopi9
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Hi

If a person jumps(countermovement jump) then there would be 2 impulses that is the 1st impulse would be when person sits down, getting ready to jump and the 2nd impulse would be when he jumps back on to the ground.
1)I want to know the relationship between these 2 impulses.
2) How can we compare these 2 impulses??
3)Can we plot graph for these 2 impulses versus time?
 
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I am not from physics background. I am very good at these stuff.
So please help me
 
Your question is not very clear. What is a "countermovement" jump?
In your two impulses, you left out the most obvious - the take-off. Let's just compare take-off and landing.
Ignoring air resistance, and assuming the same posture for the instant of take-off and the instant of landing, the take-off and landing speeds will be the same. It follows that the momenta (impulse) will be the same, just in opposite directions.
 

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