Question

negative acceleration means *
○ speeding up
○ slowing down
○ change in velocity
○ all of the above

acceleration due to gravity *
^2 (means to the second power)
○ 9.81 m/s^2
○ -9.81 m/s^2
○ 9.81 m/s
○ 9.81 s

Explanation:

• Negative acceleration: In physics, acceleration is the rate of change of velocity. Negative acceleration (also called deceleration) occurs when the acceleration is in the opposite direction to the velocity, which means the object is slowing down.
• Acceleration due to gravity: The standard value for the magnitude of acceleration due to gravity near the Earth's surface is approximately \(9.81\ m/s^{2}\). The direction is towards the center of the Earth. If we take the upward direction as positive, then the acceleration due to gravity is \(- 9.81\ m/s^{2}\). But when just referring to the value of acceleration due to gravity (magnitude), it is \(9.81\ m/s^{2}\). The unit of acceleration is \(m/s^{2}\), \(9.81\ m/s\) is a unit of velocity and \(9.81\ s\) is a unit of time.

Answer:

• For "Negative acceleration means": B. slowing down
• For "Acceleration due to gravity": A. \(9.81\ m/s^{2}\)