A body is projected such that its kinetic energy at the top of its trajectory is `frac(3)(4)` of its initial kinetic energy. What is the angle of projection of the projectile?

What is kinetic energy?

What is the kinetic energy of an object?

What is surface energy? What is its unit?

From the kinetic theory of gas, prove that P= frac(2)(3)E , where E is the kinetic energy per unit volume of the gas.

What is the source of the kinetic energy of the falling rain drop?

Two discs of moments of inertia /, and l2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speeds omega and omega are brought into contact face to face with their axes of rotation coincident, (a) What is the angular speed of the two-disc system? (b) Show that the kinetic energy of the combined system is less than the sum of the initial kinetic energies of the two discs. How do you account for this loss in energy? Take . omega ne omega

Can an object have kinetic energy even if its momentum is zero? Explain.

A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad s-^1. The radius of the cylinder is 0.25 m. What is the kinetic energy associated with the rotation of the cylinder? What is the magnitude of angular momentum of the cylinder about its axis?

The kinetic energy of an object of mass, m moving with a elocity of 5 ms^-1 , is 25J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?

What is the relation between kinetic energy and moment of inerita for a rotational body?