The unit centimeter (cm) is preferable for expressing the height of a person. A centimeter is a smaller unit of length, making it more suitable for measuring everyday things like a person’s height. For example, a person’s height might be ...

The motion of dropping an eraser is called straight-line motion or linear motion. When you drop the eraser, it moves in a straight path towards the ground due to the force of gravity. The motion is along a straight line, ...

If the zero mark on a scale is broken, you can still measure the length of an object by starting from a different point on the scale. For example, you can start measuring from the next visible marking and subtract ...

Visually challenged students use raised-marked scales because they allow them to feel and read measurements through touch. These scales have raised lines or bumps that represent the units of length, such as centimeters or inches, so students can trace them ...

To determine if an object is in motion, you need to compare its position with a reference point. If the object changes its position relative to the reference point over time, then it is in motion. For example, if a ...

The motion of a child on a swing is called oscillatory motion. In this type of motion, the swing moves back and forth in a regular pattern, with the child swinging to one side and then returning to the other. ...

Large distances are usually expressed in kilometers (km). One kilometer is equal to 1,000 meters, making it a convenient unit for measuring long distances, such as the distance between cities or countries. For example, the distance between two cities may ...

Reference points are essential in measuring distance because they provide a starting or fixed point from which measurements can be made. Without a reference point, it would be difficult to determine how far an object has moved or how far ...