I had a couple of questions for homework and I answered them the best I could. Can someone check and tell me if they are correct?
1.To describe the position of an object accurately, scientists use what?
Ans- Coordinate Systems
2.In science, we have to describe the motion of an object ___________ to other objects. Ans- relative
3.The motion of an object involves changes in both distance and what?
Ans- time
4.An object moves along a straight line. It moves +3.0 cm then -5.0 cm. It has a ____________ of -2.0 cm and travels a ____________ of 8.0 cm.
Ans- displacement; distance
5.Motion from one place to another is called ____________ motion. Ans- translational
Thanks for the help! -MC
All the answers look good.
1. Your answer for the first question is correct. To describe the position of an object accurately, scientists use coordinate systems. Coordinate systems provide a reference frame and a set of numbers or coordinates to specify the position of an object in space.
2. Your answer for the second question is correct. In science, when describing the motion of an object, it is important to consider the motion relative to other objects. This means taking into account the position, direction, and speed of the object in relation to other objects or reference points.
3. Your answer for the third question is correct. The motion of an object involves changes in both distance and time. Distance refers to the amount of ground covered by the object, while time represents the duration of the motion.
4. Your answers for the fourth question are partially correct. The object moves +3.0 cm and then -5.0 cm, indicating that it changes position in both positive and negative directions. The correct term to describe this change in position is displacement, which considers both direction and magnitude.
However, the object's displacement is not -2.0 cm. To calculate displacement, you need to find the net change in position. In this case, you have a positive displacement of +3.0 cm and a negative displacement of -5.0 cm. To find the net displacement, you subtract the negative displacement from the positive displacement:
+3.0 cm - (-5.0 cm) = +3.0 cm + 5.0 cm = +8.0 cm
So, the correct displacement is +8.0 cm.
The term distance refers to the actual path traveled by the object, regardless of direction. In this scenario, the distance traveled is the sum of the magnitudes of both the positive and negative displacements:
|+3.0 cm| + |-5.0 cm| = 3.0 cm + 5.0 cm = 8.0 cm
Hence, the correct distance traveled is 8.0 cm.
5. Your answer for the fifth question is correct. Motion from one place to another is generally referred to as translational motion. Translational motion describes the movement of an object in space without any rotation or angular change.