A body is at rest on the surface of the earth. Which of the following statements is correct?
A
Only the weight of the body acts on it.
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B
Only upward force acts on the body.
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C
Frictional force acts on the body.
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D
Net upward force is equal to the net downward force.
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Solution
The correct option is D Net upward force is equal to the net downward force. A body is at rest on the surface of the earth.
Hence, the net upward force is equal to the net downward force for body is in rest on the earth .The forces must be balance for body to be in state of rest or undistrubted state of motion.