Consider the following statements about nature of work done by gravitational force : a. May be negative b. May be positive c. May be zero d. Always positive
Which of the following option is correct?
A
a,b & d are correct
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B
a,b & c are correct
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C
a,c & d are correct
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D
all correct
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Solution
The correct option is A a,b & c are correct Case of negative work:- When a body possesses a velocity opposite to the direction of gravity. eg:- Ball thrown upwards from ground Case of positive work:- When body possesses a velocity parallel to the direction of gravity. eg:- Ball falling from a cliff. Case of zero work:- when displacement is zero. eg:- Ball kept on a horizontal table at rest.