6.[1pt] A car, mass mj is moving to the right on a frictionless air track. It co
ID: 2036075 • Letter: 6
Question
6.[1pt] A car, mass mj is moving to the right on a frictionless air track. It collides with a second car, mass m2, which is initially at rest. Which of the following statements are true? (If A and E are true, and the others are not, enter TFFFT) A) If car 1 is much lighter than car 2, and the collision is perfectly elastic, car 1 will be heading back to the left with nearly its original speed after the collision. B) If car 1 sticks to car 2, the final total kinetic energy of the carl-car2 system is less than the initial total kinetic energy of the two cars. C) Suppose (for this statement only) that car 2 was NOT initially at rest, but was instead heading towards car 1 with equal (but opposite) momentum before the collision. After the collision, the cars must both be at rest. D) If car 1 sticks to car 2, the carl-car2 system must move to the right after the collision. E) If the collision is elastic, car 1 must always come to a stop after the collision. Last Answer: FFFFF Answer: Incorrect, tries 2/6. Submit All AnswersExplanation / Answer
The Answer is " FFFTF"
a) False, If car 1 is much lighter than m2, and the collision is perfectly elastic, car 1 will continue heading to the
right with nearly its original speed after the collision.
b) False, If car 1 sticks to car 2, the final total kinetic energy of the car1-car2 system is less than the initial total
kinetic energy of the two cars.
c) False, Suppose (for this statement only) that car 2 was NOT initially at rest, but was instead heading towards
car 1 with equal (but opposite) momentum before the collision. After the collision, the cars must both be at rest.
d) True , If car 1 sticks to car 2, the car1-car2 system must be at rest after the collision.
e) False, If the collision is elastic, car 1 will never come to a stop after the collision.
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