Question

An object is launched upward. While it is moving upward, which of the following statements is accurate?

1. Velocity is positive, and acceleration is negative.
2. Velocity is negative, and acceleration is negative.
3. Velocity is positive, and acceleration is positive.
4. Velocity is negative, and acceleration is positive.

Answer 1

When an object is launched upward, its velocity is initially positive but becomes negative as it moves upward and then downward. The acceleration of the object is always negative while it is moving upward.

Step-by-step explanation:

When an object is launched upward, the velocity of the object is initially positive because it is moving in the positive direction. However, as the object moves upward, its velocity decreases, eventually becoming zero at the highest point of its trajectory.

At this point, the object starts to move downward, and its velocity becomes negative. Therefore, while the object is moving upward, the velocity is positive initially and then becomes negative.

The acceleration of the object, on the other hand, is always negative when it is moving upward due to the force of gravity pulling it down. Regardless of whether the object is moving upward or downward, the acceleration remains constant and negative.

Therefore, the accurate statement about the object while it is moving upward is that the velocity is positive and the acceleration is negative.