Motion and Meas...

While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and on the other end is 33.1 cm. What is the length of the needle?

Choose the correct statement(s).

a. The length of the scale that is used to measure an object must be greater than the length of the object.
b. The eye should be placed just above the points that you are reading, otherwise there will be error due to parallax.
c. If the zero mark of a scale is damaged or edge of the scale is not smooth, then start measuring from another mark.

Which of the following options is an example of a rectilinear motion?

Match the items given in Column A with those given in Column B.

A piece of thread, folded five times, is placed along the 15 cm long scale with one end lying at 1 cm mark and the other end lying at 14.3 cm mark. Then, the length of the thread is

Two statements are given below. Read both the statements carefully and choose the correct alternative.

Statement A: Motion of the second hand of a clock is rectilinear.
Statement B: In rectilinear motion, each particle of the body moves in the same direction and with the same speed.

Which of the following is the example(s) of periodic motion?

Choose the correct statement(s).

(a) Beating of our heart is a non-periodic motion.
(b) The points on the rim of a rotating wheel move in a circular path.
(c) Motion of the seconds hand of a clock is rectilinear.

Motion of the strings on a veena is

(a) vibratory
(b) periodic
(c) rotatory