Two carts are initially at rest next to each other on a smooth horizontal track. Cart A's mass is three times cart B's mass. Cart B releases a spring, pushing cart A such that both carts move away from each other. Which statement below is correct about the carts' kinetic energies?
A.
Cart B has nine times the kinetic energy of cart A.
B.
Cart B has three times the kinetic energy of cart A.
C.
Cart B has the same kinetic energy as cart A.
D.
Cart B has one-third the kinetic energy as cart A.
Exam No：AP Physics 1 Problem Set 1 Year：2024 Question No：APPhysics12024AP0202
Answer:
B
Knowledge points:
4.3 Conservation of Energy, the Work Energy Principle, and Power
5.4 Conservation of Linear Momentum
Solution:
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