A particle, initially at rest on a frictionless horizontal surface, is acted upon by a horizontal force is constant in magnitude and direction. A graph is plotted of the work done on the particle W, against the speed of the particle V. If there are no other horizontal forces acting on the particle, the graph would look like:

A body of mass 2 kg moving with a velocity of 3 m/sec. collides head on with a body of mass 1 kg moving in opposite direction with a velocity of 4 m/sec. After collision, two bodies stick together and move with a common velocity which in the units m/sec. is equal to

An electron of mass 9.0 × 10^-28 g is moving at a speed of 1000 m/sec. Calculate its kinetic energy. If the electron takes up this speed after moving a distance of 10 cm from rest position. Calculate the force in kg-weight acting on it.

A neutron travelling with a velocity and K.E. 'E' collides perfectly elastically head on with nucleus of an atom of mass number A at rest. The fraction of total energy retained by the neutron is:

A stationary radioactive nucleus of mass 210 units disintegrates into an alpha particle of mass 4 units and a residual nucleus of mass 206 units. If the kinetic energy of the alpha particle be E, the kinetic energy of residual nucleus is:

A compressor A compresses one litre of air from a pressure of 1 atmosphere to a pressure of 3 atmosphere and does work W_A But compressor

B compresses one litre of water from a pressure of one atmosphere to three atmosphere and does work W_B, then

A cyclist rides up a hill at a constant velocity. Determine the power developed by the cyclist if the length of the connecting rod of the pedal r = 25 cm, the time of revolution of the rod is t = 2 SEC and the mean force exerted by his foot on the pedal is F = 15kgf

Two solid rubber balls A and B having masses 200 & 400 gm respectively are moving in opposite direction with velocity of A equal to 0.3 m/sec. After collision, the two balls come to rest when the velocity of B is: