2002 - WAEC Physics Past Questions and Answers - page 2
An object A is held in equilibrium as illustrated in the diagram above. Using the data on the diagram determine the magnitude, W of the weight of
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
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]
Which of the following statements correctly defines quantitatively the work done by a force? the product of the force and the distance moved
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]
A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%, determine its mechanical advantages
Which of the following actions will improve the efficiency of the pulley system?
The ice and steam points of a certain thermometer are -20o and 100o respectively. Calculate the Celsius temperature temperature corresponding to 70o on the thermometer
The silver coating on the inside of a vacuum flask reduces heat loss by
Water of mass 120g at 50oC is added to 20og of water at 10oC and the mixture is well stirred. Calculate the temperature of the mixture. [Neglect heat losses to the surrounding]