Question 1

Which of the following is a standard unit of length?

Accepted Answer

The standard unit of length in the International System of Units (SI) is the meter. It is universally accepted to maintain uniformity in measurements across the world.

Question 2

Motion of a wheel of a moving bicycle is an example of:

Accepted Answer

The wheel of a bicycle undergoes rotational motion as it spins about its fixed axle, and simultaneously translational (rectilinear) motion as the bicycle moves forward.

Question 3

One meter is equal to how many centimeters?

Accepted Answer

By definition in the metric system, the prefix 'centi' means one-hundredth. Therefore, one meter is divided into 100 equal parts called centimeters.

Question 4

Which motion is repeated after a fixed interval of time?

Accepted Answer

Periodic motion is defined as motion that repeats itself at regular intervals of time, such as the swinging of a pendulum or the motion of the earth around the sun.

Question 5

In ancient times, people used which of the following to measure length?

Accepted Answer

In ancient times, people used body parts such as cubit, hand span, and foot span to measure lengths, though these varied from person to person.

Motion and Measurement of Distances