I Review | Constants A factory worker pushes a 30.0 kg crate a distance of 3.3 m along a level floor at constant velocity by pushing downward at an angle of 30° below the horizontal. The coefficient of kinetic friction between ? the crate and floor is 0.25. W = J Submit Request Answer Part D How much work is done by the normal force? Express your answer in joules. ? Wnf = J Submit Request Answer Part E How much work is done by gravity? Express your answer in joules. ? W, = 9.8 J Submit Previous Answers Request Answer X Incorrect; Try Again Your answer is the acceleration due to gravity. You need to find the work done by the force of gravity. 圓 圓

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▼ Part A How much work must you do to push a 10.0 kg block of steel across a steel table (uk = 0.60) at a steady speed of 1.20 m/s for 5.20 s? Express your answer with the appropriate units. View Available Hint(s) Wp push = Submit Part B P = Submit Value What is your power output while doing so? Express your answer with the appropriate units. ► View Available Hint(s) HÅ μÅ Value Units Units ? ?

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Newton's law of universal gravitation is represented by F= G* Mm/ T where F is the gravitational force, M and m are masses, and r is a length. Force has the Sl units kg • m/s?. What are the Sl units of the proportionality constant G? Show the work.

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You and your friend are moving a 82kg box across the floor at a constant speed.  You are pushing on the crate parallel to the ground with a force of 62N.  Your friend has a rope tied to the box and they are pulling it at an angle of 37° to the ground with a force of 32N. Construct the free body diagram showing the force acting on the crate in order to find the magnitude of friction the floor exerts on the box.

1.1 A sled is dragged 8.0 m along a horizontal path at a constant speed of 0.30 m/s by a rope that is inclined at an angle of 25° above the horizontal. The tension in the rope is 450 N. What was the magnitude of the work done by the rope on the sled?