According to the International System of Units, which of the following is the fundamental unit of length?

One metre is _________ of the distance from the equator to the north pole along the longitude passing through Paris in France.

Which of the following statements is/are not correct about a scale?

a. A scale can easily be taken from one place to another. b. The numbers on a scale can be adjusted according to the length of the object. c. The scale does not change during measurement.

Which of the following statements is/are false?

a. The comparison of an unknown quantity with a known fixed quantity of some kind is called measurement. b. A measurement is completely known only if it shows the number and the unit of measurement. c. The third object used for comparing the lengths of two objects is called a unit.

Which of the following is/are not a source of an error in measuring the length of a wooden plank through a meter scale?

a. Error due to incorrect placement of the scale b. Error due to the thickness of the scale c. Error due to the thickness of the wooden plank to be measured

Which of the following statements is/are false?

a. For the sake of uniformity, scientists all over the world have accepted centimetric system of measurement. b. A unit that is acceptable to a majority of the people as a basic unit of measurement is called a standard unit. c. When the position of a body does not change with time, with respect to the surroundings, the body is said to be at rest.

A train moving along a straight rail track is an example of

Which of the following is an example of curvilinear motion?

Match the following ||| |---|---| |a. 10 millimetre|1. 12 inches| |b. 1 feet|2. 1 kilometre| |c. 1000 metre|3. 1 centimetre|

The motion of a potter's wheel along its axis is an example of

The production of sound from string of a musical instrument is based on which of the following motions?

Which of the following is an example of motion of rotation and motion of translation occurring at the same time?

Match the following ||| |---|---| |a. Rectilinear motion|1. It is the motion described by an object moving to and fro as a whole along the same path without changing its shape. | |b. Curvilinear motion|2. It is the motion described by a body that is moving along a straight line.| |c. Oscillatory motion|3. It is the motion described by a body that is moving along a curved line.|

The needle of a sewing machine moving up and down is an example of

Match the following ||| |---|---| |a. Translatory motion|1. It is the motion in which a body moves about a fixed axis without changing its position.| |b. Circular motion|2. It is the motion in which all the particles of a body move through the same distance in the same time. | |c. Periodic motion|3. It is the repetitive motion which repeats itself after a fixed interval of time. |

Match the following ||| |---|---| |a. Vibratory motion|1. It is a kind of oscillatory motion in which the moving object undergoes a change of shape or size. | |b. Non-periodic motion|2. It is the motion in which a body covers unequal distances in equal intervals of time along the same straight line. | |c. Non-uniform motion|3. It is a repetetitive motion which repeats itself, but not at fixed intervals of time. |