If a force of 50N stretches a wire from 20m to 20.01m, wh...
If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?
250N
200N
100N
50N
Correct answer is A
Original length = 20m
first new length = 20.01m
first increase in length = 20.01m - 20m = 0.01m
Second new length = 20.05m
second increase in length = 20.05 - 20m = 0.05m
From hooke's law = F1e1=F2e2⟹500.01=F20.05⟹F2=50×0.050.01=250N
A train of mass 1600 kg attains a speed of 25 ms−1 in 20 seconds. The power developed in the ...
An a.c. generator can be converted into a d.c. generator by replacing ...
What happens when a gas expands at constant temperature? ...
Which of the following statements about defects of vision is/are CORRECT? I. For a long ...
The diagram above is a micrometer screw gauge. Determine its reading ...
The process through which free electrons leave the surface of hot metal is known as? ...
The inner diameter of a small test tube can be measured accurately using a ...