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INSTRUCTIONS: Write and answer correctly every exercise. Include logical or mathematicalprocedure, formulas, laws, charts, diagrams, citations you have used on each one. Highlight the result and write it with the correct physical units.


1. Write and solve Problem5, page 162 from Giancoli, sixth edition.
A box of mass 5.0Kg is accelerated from rest across the floor at a rate of 2.0m/s^2 for 7.0s. Find the net work done on the box.[pic]R: W=490J




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2. Write and solve Problem 24, page 163 from Giancoli, sixth edition.
How high will a 1.85Kg rockgo if thrown straight up by someone who does 80.0J of work on it? Neglect air resistance.
R: D=4.4m






















3. Write and solve Problem43, page 164 from Giancoli, sixth edition.
The roller-coaster car is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed atpoints 2, 3, and 4.
R: 1-2 Vf=20 1-3Vf=11.83 1-4 Vf=20























4. Write and solve Problem 58, page 164 from Giancoli, sixthedition.
How long will it take a 1750 W motor to lift a 315Kg piano to a sixth window 16.0m above?
R: T=28.8s


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5. Write and solveProblem 60, page 164 from Giancoli, sixth edition.
A 1400Kg sports car accelerates from rest to 95 km/h in 7.4s. What is the average power delivered by the engine?
R:Avgf=18466N




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