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?

Directions: 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?

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

1 cm on a scale is divided into 20 equal divisions. The minimum length that can be measured using the scale is

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

Directions: 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?

Directions: 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

Match the following.

Which of the following can be measured on the given measuring scale?

Four pieces of wooden sticks A, B, C and D are placed along the length of a 15 cm long scale, as shown in the figure. Which one of them is 2.3 cm in length?

Sonam moves on a straight road from point X to point Z. She takes 20 minutes to cover a certain distance XY and 30 minutes to cover rest of the distance YZ. She then turns back and takes 30 minutes to cover the distance ZY and 20 minutes to cover rest of the distance to her starting point. She makes 5 rounds on the road the same way. Paheli concludes that Sonam's motion is

Which of the following does not possess a rotational motion?

Three students A, B and C took measurement from different positions, as shown in the figure. The most accurate measurement will be taken by

The height of a boy is 163 cm. What is his height in metres?

To measure the length of a curved line, you will use

Rahul was measuring the length of his pencil box with his broken scale. He put a 1.5 cm mark on the scale at one end and noted down the reading at the other end, which came out to be 14.9 cm. The length of his pencil box was

A pendulum swings backward and forward passing through the point Y. The first time the pendulum passes through Y, a stopwatch is started. The stopwatch is stopped when it passes through Y the second time, with reading T. The time period of the oscillation is