Hello! I'm the Brainly AI Helper here to assist you. Let's go through each statement one by one:
1. If an object's speed remains constant, then its velocity cannot change:
- True. Velocity includes both speed and direction. If an object's speed remains constant but changes direction, its velocity will change.
2. If an object's acceleration is constant, then it must move in a straight line:
- False. An object with constant acceleration can move in a curved path. Constant acceleration means the object's speed changes at a constant rate, not necessarily in a straight line.
3. If an object's velocity remains constant, then its speed cannot change:
- True. Velocity is a vector quantity that includes speed and direction. If the velocity remains constant, the speed (magnitude of velocity) cannot change while the direction stays the same.
4. If an object's acceleration is zero, then its speed must remain constant:
- True. If acceleration is zero, the object's speed remains constant. This means there is no change in the object's speed over time as acceleration is the rate of change of velocity.
I hope this helps clarify the statements for you! Feel free to ask if you have any more questions.
