6 Motion and Measurement of Distances

One centimeter on a scale is divided into 10 equal divisions. The least count (minimum value) of this scale is

• A) 20 cm

• B) 1 mm

• C) 0.1 mm

• D) 0.5 mm

Which of the following motions is/are periodic as well as oscillatory motion?

• (i) and (iii)

• (ii) only

• (I) and (ii)

• (iii) and (iv)

A) Motion of soldiers on a straight path in march past is a-

• periodic motion.

• random motion

• curvilinear motion

• rectilinear motion

Which of the following statements is incorrect?

• A) Motion of a vehicle on a straight road is not rectilinear motion.

• B) Motion of honeybees is the example of random motion.

• C) Cubit is the length of a forearm.

• D) Centigrade is not the SI unit of temperature.

While measuring the length of a wooden box, the reading at one end is 1.5 cm and the other end is 4.7 cm. What is the length of the wooden box?

• A) 4.7cm

• B) 1.5cm

• C) 3.2 cm

• D) 6.2 cm

Motion of strings of a guitar shows

(i) oscillatory motion

(ii) vibratory motion

(iii) random motion

(iv) rotational motion

• A) (i) and (ii)

• B) (i) and (iii)

• C) (ii) and (iii)

• D) (ii) and (iv)

Estimate the length of the thread.

• 15cm

• 14.5 cm

• 10 cm

• 13.5 cm

A length of a curved line can be measured using a -

• scale

• thread and ruler

• measuring cylinder

• cannot be measured

Heartbeat is a type of __________ motion.

• oscillatory

• periodic

• circular

• translatory

A change in position of an object with time is called _____________.

• Force

• Motion

• Pressure

• Measurement