In which of the following cases is work done?   what is the answer?    a) running around the oval   b) swimming across the pool   c) dragging a crate along the floor   d) carrying a basketful of fruits

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Three objects of the same mass begin their motion at the same height. One object falls straight down, one slides down a low-friction inclined plane, and one swings in a circular arc on the end of a string. All three objects end at the same height. On which object does gravity do the most work?   A) The object in free fall B) The object sliding down the low-friction incline C) The object traversing the circular arc D) Gravity does equal work on all three objects

The two ropes shown in the bird's-eye view of the figure are used to drag a crate 5.8 m across the floor. How much work is done by the force fk→?Express your answer with the appropriate units. How much work is done by the force T1→?Express your answer with the appropriate units. How much work is done by the force T2→?Express your answer with the appropriate units.

1. Calculate the work done on the suitcase by  F→. Express your answer with the appropriate units. 2. Calculate the work done on the suitcase by the gravitational force. Express your answer with the appropriate units. 3.Calculate the work done on the suitcase by the normal force. Express your answer with the appropriate units. 4. Calculate the work done on the suitcase by the friction force. Express your answer with the appropriate units. 5. Calculate the total work done on the suitcase. Express your answer with the appropriate units. 6. If the speed of the suitcase is zero at the bottom of the ramp, what is its speed after it has traveled 3.90 mm along the ramp? Express your answer with the appropriate units.

3) The meaning of the word "WORK" is quite different in physics from its everyday usage. Give an example of an action a person could do that "feels like work" but that does not involve any work as we've defined in this chapter. Support your reasoning with equations/data.

Question 1  The first question does not require the coefficient of friction. Doesn't all the work being performed by the system = friction? Friction is the only thing that is performing work?

A system of two objects has AKtot = 7 J and AUint = -4 J. Part A How much work is done by interaction forces? Express your answer in joules. IVE ΑΣΦ Wint = Submit Part B How much work is done by external forces? Express your answer in joules. V—| ΑΣΦ Wext= = Request Answer Submit Request Answer ? ? J J

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For a constant force, work is defined as the: Cross product between the force and the displacement. O Magnitude of the force multiplied by the distance travelled. O The squared product between the force and the distance O Scalar product between the force and the displacement