Need help on 1 & 2 9:11 PM 9. MOMENTUM AND IMPULSE/STRUCTURED Synthesis Question

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Need help on 1 & 2 9:11 PM 9. MOMENTUM AND IMPULSE/STRUCTURED Synthesis Questions If an object experiencing a collision was to hit a soft cushion rather than a rigid surface, would the impulse be different? Assume the object's initial and final velocities are the same in both collisions. Justify your answer. If possible, try this with your lab setup. O 1. barriers" after the inventor, race car driver John Fitch. How do these barrels reduçe injar vehicle occupants if their car crashes into them on exiting the freeway? 2 Near the exits of many highways are yellow plastic barrels filled with sand called "Fi to

Explanation / Answer

1. Impulse on the object is related to the change in Momentum of the object. Consider a large force F acting on an object for a very small duration t, then this F is considered to be an impulsive force(which can change a the momentum considerably in a very small time, like normal force in a collision between two objects). The Impulse is defined by the integral of force over time, which is equivalent to change in momentum of the object. So impulse = P(f) - P(i). so if the initial and final momenta are the same, the impulse will be same no matter which tyoe of surface the object collided with.

2.When the Vehicle crashes with the Fitch Barriers, net change in momentum is same as if it would have crashed to a rigid surface, but the damage doesn't depends only on change in momentum but also on the time interval in which this change happened. The fitch barriers are filled with sands hence they are not a rigid body, they can be compressed and momentum can be distributed to the sands. this increses the collision time and reduces the chance of injury.

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