Question

the gravitational field strength at point p due to uniform solid hemisphere of mass M and radius R is E then the gravitational field strength at point Q is​

Answer 1

Answer:

The gravitational field at P and Q due to the whole sphere is given as

4R

2

GM

.

As the gravitational field due to the hemispherical shell at point P is I, using symmetry the gravitational field due to the imaginary hemispherical shell at point Q would also be I.

Thus the gravitational field due to the given hemisphere at point Q will be

(Gravitational field due to whole sphere at Q)-(Gravitational field due to imaginary hemisphere at Q)

=

4R

2

GM

−I