Measurements & Motion

In an experiment, the distance between two points which are 0.7 m and 0.8 m apart needs to be measured. Which of the following instruments should be used so that the distance can be measured to an accuracy of 0.001 m?

• A half-metre rule

• A metre rule

• A ten-metre measuring tape

• A micrometer screw gauge

Which of the following is a vector quantity?

• Time

• Energy

• Velocity

• Temperature

• Speed

The figure shows the reading on a micrometer screw gauge when it is used to measure the diameter of a thin wire. One complete turn of the thimble is 0.50 mm.

• 33.5 mm

• 34.5 mm

• 1.83 mm

• 0.83 mm

Which of the S.I units of the quantities given is correct?

• Temperature - kelvin

• Time - minutes

• Mass-gram

• Length-centimeter

Which of the following is a fundamental physical quantities?

• Speed

• Volume

• Area

• Time

The dimension of force is _____.

• Acceleration

• Velocity

• Momentum

• Energy

Which of the following represents the dimensions of mass?

• [ M¹ L⁰ T¹ ]

• [ M¹ L¹ T¹ ]

• [ M⁰ L¹ T¹ ]

• [ M¹ L⁰ T⁰ ]

• None of the options are correct

Which of the following physical quantities are derived?

1. I. Area II. Thrust III. Pressure IV. Mass

• IV only

• II and IV

• I, II, III and IV

• II and III

• I, II and III