TBR # 4 pg. 192: The situation is a bullet colliding into a block. If the bullet mass keeps increasing, why does the resulting system have a maximum final speed?
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You are right? The final speed right after the collision. I misinterpret the question. But the bullet mass increases? This is a bit confusing too.Imagine this scenario. The block which the bullet is striking is 1kg. How say you start the experiment with a bullet that is .001kg. The speed will drastically change for the bullet when is strikes the block because it is so much smaller. But say the bullet is not 100000000kg. That is huge. Thus when such a large object strikes another object, the final speed changes very little, so at very large masses the speed of the bullet plateaus.
TBR # 4 pg. 192: The situation is a bullet colliding into a block. If the bullet mass keeps increasing, why does the resulting system have a maximum final speed?
You are asking about torque causing the pole to be displaced out of equilibrium? The center of mass of the system is not the same as the center of mass of the pole. By moving the object(s), you displace its mean location due to relative distribution of masses of the whole. Make sense? "Mean location" is just another word for a relative location.So I have another question, lol:
If there was a pole on top of a fulcrum with two objects hanging on either end was in rotational and translational equilibrium, and one of the object was moved to disturb this.. the forces will no longer be in translational equilibrium & rotational equilibrium. Now the forces no longer act at the fulcrum, but now all of the forces act at the center of mass of the pole. So, I guess by moving one of the object, it moved the center of mass?
So what was the answer to the original question, is it C?
impulse = mdeltaV. In the first case her velocity goes from 0 m/s to 1.33 secs. Delta V = 1.333One more question:
BR pg. 202, #5. (regarding momentum)
situation I: Khoi states toward a stationary Jen at a constant speed of 2 m/s. They collide and move together following collision.
Situation II: Jen skates toward a stationary Khoi at a constant speed of 2 m/s. They collide and move together following collision.
Khoi is 2 X the mass of Jen.
The question asks, in which situation does Jen feel the largest magnitude of impulse.
The answer was that Jen felt the same magnitude of impulse in either situation since her change in V is same in each situation. Khoi was heavier = greater momentum & greater force, and since impulse is = F*t, I thought situation I had greater impulse. Where is my logic incorrect?