The work done in extending a spring by 40 mm is 1.52J. Ca...
The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.
38.8 Nm-1
60.8 Nm-1
190.0 Nm-1
1900.0 Nm-1
3800.0 Nm-1
Correct answer is D
Force = Elastic constant x extension
Work done = \(\frac{1}{2} K \times e^2\)
Given Work done = 1.52J; Elastic constant (k) = ?; e = 40mm = 0.04 m
\(\therefore 1.52 = \frac{k \times (0.04)^2}{2}\)
\(3.04 = k \times 1.6 \times 10^{-3}\)
\(k = \frac{3.04}{1.6} \times 10^3\)
= 1.9 x 10\(^3\)
= 1900 Nm\(^{-1}\)
A boy cycles continuously through a distance of 1.0 km in 5 minutes. Calculate his average speed...
If the angle between two vector P and Q is Oo, the vectors are said to...
An air bubble of volume 2 cm\(^3\) is formed 20m under water. What will be its volume when it r...
A satellite revolving around the earth is kept on its orbit by? ...
A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II a...
One of the following readings represents the measurement of the length of a metal rod using ver...
In the fig above if the atmospheric pressure is 760mm, the pressure of the chamber G is ...