Questions: A moving object "reaches its maximum height." Which of the following statements is true?
The time is equal to zero.
Its velocity is equal to zero.
Its displacement is equal to zero.
Its acceleration is equal to zero.
Transcript text: A moving object "reaches its maximum height." Which of the following statements is true?
The time is equal to zero.
Its velocity is equal to zero.
Its displacement is equal to zero.
Its acceleration is equal to zero.
Solution
Solution Steps
Step 1: Consider the motion of the object
When a moving object reaches its maximum height, it momentarily stops moving upwards before it starts to fall back down.
Step 2: Analyze the velocity
At the maximum height, the object's vertical velocity is zero because it is changing direction from upward to downward.
Step 3: Analyze the other quantities
The time at maximum height is not zero. The displacement is not zero, as the object has moved from its initial position. The acceleration due to gravity is still acting on the object, so it is not zero.