4. A 2.5 kg wagon moves in a straight line on a frictionless horizontal surface with...

 

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4. A 2.5 kg wagon moves in a straight line on a frictionless horizontal surface with an initial velocity of 3.0 m/s. It is then pushed for 4.0 m by a force of 2.5 N In the same direction as the initial velocity a) Use energy techniques to determine the final velocity b) Check the answer to part a) using kinematics 4. A 2.5 kg wagon moves in a straight line on a frictionless horizontal surface with an initial velocity of 3.0 m/s. It is then pushed for 4.0 m by a force of 2.5 N In the same direction as the initial velocity a) Use energy techniques to determine the final velocity b) Check the answer to part a) using kinematics