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A boy pulls a 5.0 Kg sled 10.0 m along a horizontal surface at a constant speed. The coefficient of kinetic friction is 0.20 and his pull is 37 degrees above the horizontal.
A.) what work does he do pulling the sled? (that is, what is the work done on the sled by the boy?)
B.) would the boy do more, less, or the same amount of work if he pulled horizontally on the sled?
Two point charges are located on the y-axis as follows: one charge q1 = -1.85nC located at y=-0.585m , and a second charge q2 = 3.10nC at the origin (y=0). what is the direction of the total force
A 78.3?kg bungee jumper is enjoying an afternoon of jumps. The jumper's first oscillation has an amplitude of 10.3m and a period of 4.75s. find the spring constant of the bungee cord
A 5.06 10-5 H solenoid is constructed by wrapping 63 turns of wire around a cylinder with a cross-sectional area of 9.70 10-4 m2 , Determine the change in the length of the solenoid
Based on this information and what you learned in this chapter about the action potential, estimate the total number of sodium ion channels in the membrane of a nerve cell
Venus has a mass of 4.0869*10^24 kg and a radius of 6,052 km. Calculate the acceleration due to gravity on Venus
a one pound weight is released 3 feet off the ground. at the same time a two pound weight is released 5 feet off the
Harry Potter (55kg) is riding his broom north when a Slytherin casts a spell to knock him from the broom. what is Harry's velocity
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. Illustrate what is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
The adiabatic, aergonic throttling calorimeter is a device by which the quality of wet steam flowing in a pipe may be determined. Determine (a) the enthalpy of the steam in the pipe
A 96.0 Kg man stands on a bathroom scale in an elevator that is accelerating upward at a rate of 1.90m/s^2. What is the bathroom scale reading in lbs
Tarzan swings on a 31.0m vine initially inclined at an angel of 28.0 degrees to the vertical. What is his speed at the bottom of the swing if he pushes himself with a speed of 2.5m/s
In April 1974, Steve Prefontaine completed a 10000m race in a time of 1663.6 s. Suppose \"Pre\" was at the 8550m mark at a time of 1500 s. calculate the acceleration that he had
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