Question

A raised hammer possesses
(A). K.E. only
(B). Gravitational P.E.
(C). Electrical energy
(D). Sound energy

Answer 1

Hint: Gravitational P.E. of a body is the energy possessed by the body by virtue of its height. Any raised object would definitely have some gravitational P.E. This gravitational energy will be stored in the form of gravitational field lines. Whenever this energy will convert to another form, energy from gravitational field lines will be lost.

COMPLETE STEP BY STEP SOLUTION:
Kinetic energy of a body is the energy possessed by the body by virtue of its motion. Since every point of hammer is at rest. The kinetic energy possessed by a hammer is zero.
Gravitational potential energy of a body is the energy possessed by the body by virtue of its height or position. Since the hammer is at a non-zero height above the ground, its P.E. is non-zero.
Electrical energy of a body is the energy possessed by a charged body in presence of electric field. This energy gets stored in the electric field. Since our hammer is not charged and there is no electric field, the electrical energy possessed by the hammer is zero.
Sound energy is the energy carried by sound waves. So the sound energy possessed by a hammer is zero.
Hence the correct option is B.

Note: Here it is assumed that the gravitational potential energy at ground is assumed to be zero. The hammer has some energy and can be verified by the fact that when you drop it the hammer will gain some fall down this means it will attain some energy. This energy must be coming from somewhere; this is the gravitational P.E. which is getting converted in kinetic energy.