Question

solve this numerical question

Answer 1

Kinetic Energy of Objects when it has Velocity 5 m/s.

=> K.E = 1/2 mv^2

=> K.E = (1/2 x 4 x 5 x 5) Joules.

=> K.E = 50 Joules


Kinetic Energy of object when it has velocity 10 m/s.

=> K.E = 1/2 mv^2

=> K.E = 1/2 x 4 x 10 x 10

=> K.E = 200 Joules.


=> Work Done = Difference in Kinetic Energies.

=> W = (200-50) Joules

=> W = 150 Joules.



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