1 kg ball is thrown up with speed of 9.9m/s.Calculate the work done by its weight in 1 second

          mass =   1kg 

work done = chane in kinetic energy

                  =  1/2   1 * (9.9)2        -        1/2  1  * 0

            1/2  *   98.01      -  0

                    =   49.005  j

  • 2

mass of object=1 kg

velocity=9.9m/s

kinetic energy=1/2 mv2

=1/2 *9.92

=49.005 J

  • 13
The distance moved in one second is S= ut-1/2gt2 =9.9*1-1/2*9.8*1 =5m The weight of ball is mg= 1*9.8=9.8N Work done in one second is -9.8N*5m=-49j
  • 5
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