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SP1. Suppose that two horizontal forces are acting upon a 0.25-kg wooden block as it moves across a laboratory table: a 5-N force pulling the

SP1. Suppose that two horizontal forces are acting upon a 0.25-kg wooden block as it moves across a laboratory table: a 5-N force pulling the block and a 2-N frictional force opposing the motion. The block moves a distance of 1.5 m across the table. a. What is the work done by the 5-N force? b. What is the work done by the net force acting upon the block? c. Which of these two values should you use to find the increase in kinetic energy of the block? Explain. d. What happens to the energy added to the system via the work done by the 5-N force? Can it all be accounted for? Explain. e. If the block started from rest, what are its kinetic energy and velocity at the end of the 1.5-m motion?

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