Mock Test - 3 Class - VIII

                                                  Class  - VIII

                                                      Physics

Time-20 min                                                                             FM.-10

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1) Choose the correct option.                                              [1*4=4]

a) PE of a person is maximum when he is ______

    i) Standing      ii) sitting on a chair    iii) sitting on the ground 

b) The value of g is __________________

    i) 9.8 m/s         ii) 9.8 m/s2             iii) 9.8 cm/s2

c)  Energy is measured in 

    i) kilo-watt hours  ii)  Calories      iii) Newton-metres

d) The SI unit of power is 

    i) W                 ii) N                        iii) J

2) Write the difference between power and energy.               [2]

3) What is the weight of the object that has a gravitational potential

   energy of 4800J if it is dropped from the height of 6m?     [2]

4) Mention two conditions for work be done.                        [2]

    

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