Question

question 15 1 pts a primary difference between momentum and kinetic energy is either of the above depending on circumstances kinetic energy can cancel; momenta cannot. momenta can cancel; kinetic energy cannot. none of the above question 16 1 pts after rolling halfway down an incline, a marbles kinetic energy is less than its potential energy. the same as its potential energy. greater than its potential energy.

Explanation:

For Question 15, momentum is a vector quantity (has direction), so momenta can cancel out due to opposite - directions. Kinetic energy is a scalar quantity and cannot cancel. For Question 16, when a marble rolls halfway down an incline, its potential energy is converted into kinetic energy. At the halfway - point, its kinetic energy is equal to its remaining potential energy because the total mechanical energy (kinetic + potential) is conserved in the absence of non - conservative forces.

Answer:

Question 15: C. momenta can cancel; kinetic energy cannot.
Question 16: B. the same as its potential energy.