1 Crore+ students have signed up on EduRev. Have you? Download the App |
Two particles of masses 1kg and 3kg have position vectors and respectively. The centre of mass has a position vector
Energy needed to establish an alternating current I in a coil of self inductance L is
An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 ms−1 and 2 kg second part moving with a velocity of 8 ms−1 . If the third part flies off with a velocity of 4 ms −1 , its mass would be:
If an unchanged capacitor is charged by connecting it to a battery, then the amount of energy lost as heat is
300 Joule of work is done in sliding a 2 kg. block on an inclined plane to a height of 10 meters. Taking value of acceleration due to gravity 'g' to be 10 m/s2, work done against friction is
The temperature of a body falls from 50oC to 40oC in 10 minutes. If the temperature of the surroundings is 20oC Then temperature of the body after another 10 minutes will be
A current carrying coil when freely suspended will allign itself
A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and moment of inertia about it is I. A weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the wheel will be
Which of the following equations is definitely wrong?
A block of metal weighing 2 kg is resting on a frictionless plane. It is struck by a jet releasing water at a rate of 1kg/sec and at a speed of 5 m/sec. The initial acceleration of the block will be
The potential energy of a particle executing simple harmonic motion from a distance x from its equilibrium position is
Two projectiles are fired at different angles with the same magnitude of velocity, such that they have the same range. At what angles they might have been projected?