Recent questions tagged laws of conservation of energy

+3 votes

1 answer

A particle of mass m1 is moving with a velocity v1 and another particle of mass m2 moving with a velocity v2.

asked Apr 5, 2019 in Class 12 by kratos

+2 votes

1 answer

A perfectly smooth sphere of mass m1 moving with velocity v collides elastically with a similar but initially stationary sphere of mass m2 (m1 > m2)

asked Apr 4, 2019 in Physics by kratos

+1 vote

1 answer

A block of mass 0.5kg has an initial velocity of 10 m/* down an inclined plane 30°, the coefficient of friction between the block

asked Apr 4, 2019 in Class 12 by kratos

+1 vote

1 answer

Assertion : When a beetle moves along the sand within a few tens of centimeters of a sand scorpion,

asked Apr 4, 2019 in JEE by kratos

+1 vote

1 answer

The reference frame, in which the centre of inertia of a given system of particles is at rest, translates with a velocity V

asked Apr 2, 2019 in JEE by kratos

+2 votes

1 answer

An uniform chain of mass m and length l hangs by a thread and touches the surface of a table by its lower end.

asked Mar 28, 2019 in JEE by kratos

+3 votes

1 answer

Arrange rubber, steel and glass in the order of decreasing elasticity.

asked Mar 23, 2019 in JEE by kratos

+1 vote

1 answer

A particle of mass m1 is moving with a velocity v1 and another particle of mass m2 is moving with a velocity v2 .

asked Mar 20, 2019 in Class 12 by kratos

+1 vote

1 answer

A bullet of mass m travelling with speed v hits a disc of mass M and radius R as shown and gets stuck to it. The angular velocity

asked Mar 20, 2019 in JEE by kratos

+2 votes

1 answer

Two masses m1 and m2 connected by a spring of spring constant k rest on a frictionless surface.

asked Mar 16, 2019 in Class 12 by kratos

+1 vote

1 answer

A particle of mass 2 kg is rotating by means of a string in a vertical circle. The difference in the tensions at the bottom

asked Mar 14, 2019 in JEE by kratos

+3 votes

1 answer

A rocket ejects a steady jet whose velocity is equal to u relative to the rocket. The gas discharge rate equals μ kg/*.

asked Mar 14, 2019 in JEE by kratos

+3 votes

1 answer

A small disc A slides down with initial velocity

asked Mar 10, 2019 in JEE by kratos

+3 votes

1 answer

Two particles, 1 and 2, move with constant velocities v1 and v2. At the initial moment their radius vectors are equal to r1 and r2.

asked Mar 8, 2019 in Class 12 by kratos

+1 vote

1 answer

A particle of mass 1.0 g moving with velocity v1 = 3.0i - 2.0j experiences a perfectly inelastic collision with another particle of mass 2.0 g

asked Mar 8, 2019 in JEE by kratos

+3 votes

1 answer

A molecule collides with another, stationary, molecule of the same mass. Demonstrate that the angle of divergence

asked Mar 6, 2019 in JEE by kratos

+1 vote

1 answer

A white ball of mass 1.0 kg moving with initial speed u = 0.5 m * -1 collides with stationary red ball of same mass,

asked Feb 28, 2019 in JEE by kratos

+2 votes

1 answer

A body A of mass m1 = 1.00 kg and a body B of mass m2 = 4.10 kg are interconnected by a spring as shown in figure.

asked Feb 24, 2019 in JEE by kratos

+3 votes

1 answer

In a certain two-dimensional field of force the potential energy of a particle has the form U = αx^2 +3β^2,

asked Feb 20, 2019 in JEE by kratos

+3 votes

1 answer

A conducting disc of radius r rotates with a small but constant angular velocity co about its axis.

asked Feb 18, 2019 in JEE by kratos

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