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A hammer is resting on a plane surface. If force P is applied on the hammer along with a line not passing through its centre of mass, them the hammer _____________

(a) Moves along a straight line path

(b) Stays still

(c) Is thrown away

(d) Rotates about its centre of mass

I have been asked this question in class test.

This is a very interesting question from Forces and Inertia topic in section Gravitation of Engineering Physics I

1 Answer

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The correct choice is (d) Rotates about its centre of mass

Easiest explanation: If single force acts on a body and the line of action of force passes through the centre of mass, the body will have only linear acceleration. When the force is applied along with a line not passing through its centre of mass, then the hammer rotates about its centre of mass.

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