Posted by admin | Posted in Uncategorized | Posted on 25-05-2009
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A look at what is currently available on eBay
In any collision, if we find that momentum is NOT conserved, it must mean that?
1)In any collision, if we find that momentum is NOT conserved, it must mean that
A) the digital video camera used to record the event malfunctioned.
B) none of the above
C) there must be net external force/forces acting.
D) we have made a human error.
E) Newton's 2nd Law works in only limited cases.
2)A puck slides with initial velocity 2.0 m/s on a frictionless surface and collides (head-on)inelastically with an identical puck at rest. The pucks stick together after the collision. What is the final velocity of the two pucks?
A) 0.50 m/s
B) 0.25 m/s
C) 1.5 m/s
D) 1.0 m/s
E) 2.0 m/s
3)In this inelastic collision lab, which of the following factors we do not include in our calculations?
A) angles between velocity vectors and collision axis
B) rotation of the pucks after the collision
C) mass of the pucks
D) velocity of the pucks
E) none of the answers
1) Momentum is always conserved ===> A, B, C, or D could be correct. A ===> Faulty data B==> There is no reason for the statement to be true so none are true C===> External forces we are not aware of are acting D===> We made an error in data collection E===> Is wrong, always. Even Relativistic velocities if we correct with the Lorentz Transform Beats me what your teacher was looking for
2) Mo1 = M* 2 m/s