D. Short Answer Type Questions
1. What is the metric system of units?
2. What are fundamental quantities? Name them.
3. Differentiate between the CGS and the MKS systems of units.
4. What is an oscillatory motion? Give examples.
5. Give at least four examples where an object has multiple motions.
E. Long Answer Type Questions
1. What are SI units?
2. How will you measure the length of a curved line by using a thread?
3. What is translatory motion? Define it giving its types and examples.
4. Describe the motion of a ball rolling from an inclined plane.
5. Define periodic and nonperiodic motions, giving their examples.
Answers
Explanation:
1.The metric system is a system of measurement that uses the meter, liter, and gram as base units of length (distance), capacity (volume), and weight (mass) respectively.
2.In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.
3.MKS stands for Meter, Kilogram and second. In this system of unit mass is given in Kilogram, length in meter and time in second. ... CGS system stands for Centimeter- Gram- Second system. In CGS system, length is measured in centimeters mass is measured in grams and time is in seconds.
4.Oscillatory motion is defined as the to and fro motion of the body about its fixed position. Oscillatory motion is a type of periodic motion. Examples of oscillatory motion are vibrating strings, swinging of the swing etc.
5.Merry-go-round has circular and rotational motion at the same time. * A bicycle moving on a straight road has rectilinear as well as rotational motion. * The motion around the Earth on its axis and around the sun.The sewing machine has rotational and periodic motion