A ball is dropped on to a smooth horizontal plane from certain height h. Assuming the coefficient of restitution of impact is e.
The total distance covered by the ball till it stops
1.
2.
3.
4. None of thesee
A ball is dropped on to a smooth horizontal plane from certain height h. Assuming the coefficient of restitution of impact is e.
Total time taken by ball till it stops bouncing
1.
2.
3.
4. None of these
A ball is dropped on to a smooth horizontal plane from certain height h. Assuming the coefficient of restitution of impact is e.
Total momentum delivered by the ball to the surface
1.
2.
3.
4. None of these
A ball is thrown towards a floor with speed u. The coefficient of restitution between floor and ball is "e" . The speed with which ball rebounds is :
1.
2.
3.
4.
A pendulum consists of a wooden bob of mass m and length l. A bullet of is fored towards the pendulum with a speed . The bullet emerges out of bob with a speed and the bob just complete motion along a vertical circle, then is :
1.
2.
3.
4.
The potential energy of a particle in a region of space is given as
The force acting on the particle at point (0,0,0)
1. 0 N
2. 3 N
3. 4 N
4. 7 N
A body is acted upon by a force which is inversely proportional to the distance covered. The work done will be proportional to
1. s
2.
3.
4. None of these
A block of mass m slides down a rough inclined plane of inclination with horizontal with zero initial velocity. The coefficient of friction between the block and plane is with . Rate of work done by the force of friction at time t is
1.
2.
3.
4.
The velocity of a particle moving along a line varies with distance as where a is a constant. The work done by all forces when the particle moves from x = 0 to x = l is ( mass of the particle is m)
1. 0
2.
3.
4.
A particle is projected with speed u in air at an angle with the horizontal. The graph showingg the variation of instantaneous power due to gravity P with time t will be
1.
2.
3.
4.
The work done on a particle of mass m by a force, ( K being a constant of appropriate dimensions), when the particle is taken from the point (a,0) to the point (0,a) along a circular path of radius a about the origin in the x-y plane is
1.
2.
3.
4. 0
If represent the work done in moving a particle from A to B along three different paths 1,2 and 3 respectively (as shown) in the gravitational field of a point mass m. Find the correct relation between
1.
2.
3.
4.
If kinetic energy of a body is increased by 300 % then percentage change in momentum will be
1. 100 %
2. 150 %
3. 265 %
4. 73.2 %