A body of mass 3 kg acted upon by a constant force is displaced by S' metre, given by relation , where t is in second. Work done by the force in 2 is
Two particles have masses m and 4m and their kinetic energies are in the ratio 2 : 1. What is the ratio of their linear momenta ?
The force F acting on a particle moving in a straight line is shown below. What is the work done by the force on the particle in the 1st metre of the trajectory ?
5 J
10 J
15 J
2.5 J
If the kinetic energy of a body changes by 20 %, then its momentum would change by
20 %
24 %
9.5 %
44 %
The work done in carrying a charge Q once around a circle of radius r about a charge q at the centre is
Zero
The displacement x of a particle at time t moving under a constant force is t = + 3, x in metre, t in second. Find the work done by the interval from t = 0 to t= 6 s.
Two blocks of 2 kg and 1 kg are in contact on a frictionless table. If a force of 3 N is applied on 2 kg block, then the force of contact between the two blocks will be
zero
1 N
2 N
3 N
Two identical cylindrical vessels, with their bases at the same level, each contain a liquidof density ρ. The height of liquid in one vessel in h1 and that in the other is h2. The area of either base is A. What is the work done by gravity in equalizing the levels when the vessels are interconnected ?
In an inelastic collision an electron excites a hydrogen atom from its ground state to a M-shell state. A second electron collides instantaneously with the excited hydrogen atom in the M-shell state and ionizes it. At least how much energy the second electron transfers to the atom in the M-shell state ?
+ 3.4 eV
+ 1.51 eV
− 3.4 eV
− 1.51 eV