A) Magnetic
B) Frictional
C) Electrostatic
D) Gravitational
Correct Answer: B
Solution :
Frictional force always opposes the motion of a body. This force can be reduced by using wheels under the moving body. Wheels under John?s table reduce the surface of contact between the floor and the table. As a result, frictional force between the table and the floor decreases. The correct answer is B.You need to login to perform this action.
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