Physics Past Questions

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2261

A spiral spring of natural length 30.0cm and force constant of 20Nm^-1 is compressed to 20.0cm. Calculate the energy stored in the spring

A. 0.1J
B. 1.0J
C. 10.0J
D. 100.0J

View Answer & Discuss WAEC 2002

2262

In the diagram above, AB represents a uniform rod of length 1.50m which is in equilibrium on a pivot at P, If AP = 40cm, calculate the mass of the rod. [g = 10ms^-2]

A. 0.280kg
B. 0.400kg
C. 0.613kg
D. 0.800kg

View Answer & Discuss (9) WAEC 2002

2263

Which of the following statements correctly defines quantitatively the work done by a force? the product of the force and the distance moved

A. parallel to the line of action of the force from a reference point
B. perpendicular to the line of action of the force from a reference point
C. on a line through the reference point
D. by the object

View Answer & Discuss (1) WAEC 2002

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2264

a load of mass120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms^-2]