☰
✕

Units and Measurement
Question
Wired Faculty App

A person exerts a force of 40N on a revolving door at a point 50cm from the axis. Find the torque produced by applied force.

Answer

Here,
Force, F = 40N

Distance from the axis, r = 50 cm = 0.5m

The torque produced by force is

τ = r F
  = 0.5 x 40
   = 20 Nm

Sponsor Area

Some More Questions From Units and Measurement Chapter

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.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?