7. Of the following, which is directly related to an object's mass and velocity?
Answer: C
Momentum is directly related to an object's mass and velocity.
Momentum is defined as the product of an object's mass and its velocity, making it a key concept in physics that describes the motion of an object.
A) Time
Time is a measure of the duration of events and does not have a direct relationship with an object's mass or velocity. It is an independent variable that affects how we observe motion but is not inherently connected to the properties of mass or velocity.
B) Density
Density is defined as mass per unit volume and, while it involves mass, it does not take velocity into account. Therefore, density is not directly related to an object's motion or its velocity.
C) Momentum
Momentum is the quantity defined as the product of an object's mass and its velocity (momentum = mass × velocity). This makes momentum directly related to both mass and velocity, establishing it as the correct answer.
D) Displacement
Displacement refers to the change in position of an object, measured as a vector quantity. While displacement indicates motion, it does not directly relate to the mass or velocity of the object involved.
Conclusion
Momentum is the only option that directly correlates with both an object's mass and velocity, fulfilling the criteria of the question. Other options, such as time, density, and displacement, either do not involve both variables or relate to different aspects of motion, confirming that they are not applicable in this context.