+91-8076753736 [email protected]

-->

Units And Measurement

Question

Wired Faculty App

Read each statement below carefully, and state, with reasons, if it is true or false;

(d) For perfect rolling motion, work done against friction is zero.

Solution

True
The perfect rolling begins because the force of friction becomes zero. Hence work done against friction is zero.

Some More Questions From Units and Measurement Chapter

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation