A bead travelling on a straight line wire is brought to r...
A bead travelling on a straight line wire is brought to rest at 0.2 by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1, determine the work done by the friction
[g = 10ms\(^2\)]
2 x 10\(^{-4}\)
2 x 10\(^{-3}\)
2 x 10\(^{-1}\)
2 x 10\(^2\)
Correct answer is B
Work done by friction = Friction force x displacement from the relation, f = μR
where μ = coefficient of friction ; R = normal reaction
=> F = μ mg (R = mg)
= 0.1 x 0.01 x 10
∴ work done = F x displacement
= 0.1 x 0.01 x 10 x 0.2
= 0.002
= 2 x 10\(^{-3}\)
The viscosity of a fluid depends on the following factors except the? ...
An electron of mass 9.1x 10\(^{31}\) kg is travelling at a speed of 2.0 x 10\(^6\)ms\(^{-1}\). ...
The mass of a proton is approximately equal to that of ...
Gamma rays are produced when? ...
Consider the wave equation y = 5mm sin [1cm\(^{-1}\)x - 60s\(^{-1}\)t]. The wave number is?...