A Block of Mass M Is Pulled at Constant Velocity $\theta$

question 49

Multiple Choice

A block of mass m is pulled at constant velocity along a rough horizontal floor by an applied force as shown.The magnitude of frictional force is:

• A)T cos \(\theta\)
• B)T sin\(\theta\)
• C)0
• D)mg
• E)mg cos\(\theta\)

---

Definitions:

Ultimate Question

In evolutionary biology, a term referring to the inquiry into the evolutionary reasons or purposes behind the existence of a trait or behavior.

Adaptive Value

The extent to which a trait, behavior, or characteristic increases the survival and reproductive success of an organism in its environment.

Mechanistic Causes

Explanations based on the physical and biochemical processes underlying phenomena, often used in scientific contexts to understand biological functions.

Darwinian Puzzle

A phenomenon or trait that appears to reduce the fitness of individuals, posing a question as to why it has evolved or been maintained through natural selection.