In an Elastic Collision Between Two Bodies of Mass M₁

question 85

Multiple Choice

In an elastic collision between two bodies of mass m₁ and m₂, with m₂ initially at rest, mass 1 moves off at angle θ relative to the direction of its initial velocity and mass 2 at angle φ. An exam paper shows the equations below: m₁v_1i
0
= m₁v_1f cosθ + m₂v_2f sinφ
= m₁v_1f sinθ + m₂v_2f cosφ
What error(s) has the student made?

• A) In the first equation, m₂v_2f sinφ should be m₂v_2f cosφ.
• B) In the second equation, m₂v_2f cosφ should be m₂v_2f sinφ.
• C) In the second equation, the plus sign between the terms on the right should be a minus sign.
• D) All of the errors listed above.
• E) Only errors (a) and (b) above.

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Definitions:

Individualistic Animals

Animals that prioritize their own needs and survival over that of their group or species, typically engaging in behaviors that maximize their own fitness.

Situational Forces

External circumstances or pressures that influence an individual's behavior, often beyond the person's control, impacting their actions and decisions.

Motivational Force

The driving power or influence behind actions and behaviors, often driven by needs, desires, or goals.

Unconscious Drives

Deeply rooted instincts and motivations that influence behavior and thought processes without the individual's conscious awareness.