Match the columns.
1. Three fundamental physical quantities
2. SI unit of time
3. Rotational motion
4. Hand span
5. A length which is (1/1000)th part of a metre
6. Rectilinear motion
7. A length equal to 10,000 m
8. Millimetre
(a) small unit of measuring length
(b) length, mass, time
(c) straight line motion
(d) motion about an axis
(e) improper unit of measurement
(f) 10 km
(g) seconds
(h) millimetre
Answers
Answer:
1. physical quantities are taken as fundamental is somewhat arbitrary, but the three usually selected are length, time, and mass.
2. SI unit of time (second)
3. Purely rotational motion occurs if every particle in the body moves in a circle about a single line. This line is called the axis of rotation. Then the radius vectors from the axis to all particles undergo the same angular displacement at the same time. The axis of rotation need not go through the body.
4. Hand span is a measure of distance from the tip of the thumb to the tip of the little finger with the hand fully extended. Each student places his or her dominant hand on the edge of a piece of paper with the hand fully extended. The student should make a mark at the tip of the thumb and the tip of the little finger.
5. millimeter
6. a linear motion in which the direction of the velocity remains constant and the path is a straight line.
7. 10 kilometers
8 question am not sure