When a wooden box is suspended by a spring balance, the spring stretch – McqOptions

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1.	When a wooden box is suspended by a spring balance, the spring stretches because
A.	Earths gravity pulls the box
B.	Earths magnetic field attracts the spring
C.	of the frictional force between the box and the spring
D.	of the electrostatic force between the box and the spring
Answer» B. Earths magnetic field attracts the spring

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