JAMB Physics 2007 Objective — Question 41

Question 41 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.

A boy drags a bag of rice along a smooth horizontal floor with a force of 2N applied at an angle of 60 degrees to the floor. The work done after a distance of 3m is

A. 6J
B. 4J
C. 3JCorrect
D. 1J

Explanation

Horizontal component of the force = 2cos60 = 1N. Work done = Force x distance = 1 x 3 = 3J.

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