45 m/s² is the… A. Mass B. Weight C. Acceleration D. Force\
The Correct Answer and Explanation is :
The correct answer is C. Acceleration.
Explanation:
In physics, acceleration is defined as the rate of change of velocity of an object with respect to time. It is a vector quantity, meaning it has both a magnitude and a direction. The unit of acceleration in the International System of Units (SI) is meters per second squared (m/s²), which measures how much the velocity of an object changes per second.
When we see a value like 45 m/s², it indicates that an object’s velocity is increasing by 45 meters per second for every second of time that passes. For instance, if an object starts from rest (0 m/s), after one second, it would be moving at 45 m/s; after two seconds, it would be moving at 90 m/s, and so forth. This kind of acceleration is typically observed in various contexts, such as the acceleration of gravity (approximately 9.81 m/s² on Earth) or the acceleration experienced by a vehicle when it speeds up.
To differentiate between the options given:
- A. Mass: This is a measure of the amount of matter in an object, usually measured in kilograms (kg). It does not have units of m/s².
- B. Weight: This is the force exerted on an object due to gravity, calculated as the mass of the object multiplied by the acceleration due to gravity (W = mg). It is measured in newtons (N), which can also be expressed in kg·m/s², but it is not represented in m/s² alone.
- D. Force: This is the influence that causes an object to undergo a change in speed, direction, or shape. Like weight, it is measured in newtons (N), not in m/s².
In conclusion, 45 m/s² refers specifically to acceleration, describing how quickly the velocity of an object is changing over time.