A negative work is done when an applied force F and the corresponding displacement S are
anti-parallel to each other.
For a constant force, \(W=Fs\cos\theta\). If force and displacement are antiparallel, θ = 180° and W = −Fs, so work is negative. More generally, work is negative for angles between 90° and 180°.
Similar Questions
A particle of mass m moves along x-direction under the force \(F(x) = F_0\left(1-\dfrac{x}{L}\right)\) for \(0 \leq x \leq L\). If the particle starts from rest at x = 0, then what is the speed (v) of the particle at x = L?
Important Questions from Work
A body of mass 100 kg rests on a horizontal plane, the value of coefficient of friction between the body and plane being 0.025. Find the work done in moving the body through a distance of 10 metres along the plane.
A load of 16.5 kg is lifted through a height of 3.4 metres. Find the work done in kg metre.
The energy equivalence of 1 eV is
A body of mass 100 kg rests on a horizontal plane, the value of coefficient of friction between the body and plane being 0.025. Find the work done in moving the body through a distance of 10 metres along the plane.
The work done by a person in carrying a box of mass 15 kg through a vertical height of 5 m is 5000 J. The mass of the person is _______ Take g = 10 m/s 2
