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  3. A block of mass m= 4 kg is dragged 2m, along a horizontal surface by a force F= 30N

. A block of mass m= 4 kg is dragged 2m, along a horizontal surface by a force F= 30N

acting at 53° to the horizontal. The initial speed is 3 m/s and WERE

(a) Find the change in kinetic energy of the block

(b) Find its final speed      

Best Answer

Answer: (a) The force acting on the block are shown in the figure. Cleary Wn=0

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