Big Question:
What is the relationship between impulse, force, and time during a collision?
Intro:
In this week's lab we created a collision between an empty red cart into a force-probe with aluminum attached to a ring stand with a heavier blue cart. We then deduced the velocity of the cart before and after the collision. Finally came the determination of the impulse itself which by definition is a change in momentum. We did this to measure the relationship between impulse, force, and time during a collision since they are related to each other somehow. Get ready to get your mind blown because there is some interesting stuff coming up!
Data:
Red Cart Velocity After Collision: 0.609 m/s
Area of Force: -0.337 Impulse: J = -0.319
Comparing the area of the force vs time graph has showed us that it is roughly the same as impulse. These two are equal and from there we were able to derive the equation J(impulse)= Force X time.
Big Ideas:
-Force and time are inversely related. When force goes up time goes down and when time goes up force goes down.
-In a collision the force is equal from both sides. How can this be? Well in every situation where there is a collision the force exerted on an object is the same. However what causes the great change in momentum is then the mass of the object, as the smaller object would have a much greater change in momentum and impact the overall impulse.Real World Connection:
In soccer you must control the ball to win. There are many times when the ball goes in the air and you must bring it down close to you. How does one do this? By applying the same physics laws as to that of airbags it is quite easy. Stick your foot out until it makes contact with the ball and then remove your leg. This will increase the time it takes to hit the ground, thus reducing the force. Of course this is easier said than done, so I'll let FC Barcelona player Thiago demonstrate from this video I showed Ms. Tye in class last week.
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