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A painter (m=70 kg) is standing a distance of 0.6 m from the top of a ladder (mass 40 kg and length 2.5 m). There is friction between the bottom of the ladder and the floor with ?s=0.3.
i.) Find the conditions for static equilibrium of the ladder with the painter on top.
ii.) If the angle of the ladder with the horizontal is 60°, determine whether or not this ladder will slip.
Three resistors, with values of 3.0, 6.0 and 12.0 ?, respectively, What is the overall resistance of this combination
The focal length of the eyepiece of a certain microscope is 18.0 mm. The focal length of the objective is 7.8 mm. find the overall angular magnification of the microscope
A block is resting on a ramp with coefficient of friction between the blockand the ramp being .350, What is the max angle that the block can make without slipping
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. determine how fast will the disk be turning
A screen is placed 1.30 {rm m} behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.70 {rm cm} wide-that is, two first-order diffraction minima are separated by 1.70 {rm cm}.
A chocolate bar (40grams) has 210 Calories. Approximately how long would the 100 watt light bulb shine if we convert all the chocolate's energy into electricity (100% efficiently)? (Remember 1Cal = 1000 cal = 4200 joules)
Graphing either versus or versus gives a straight line. In the graph shown above, we chose to plot on the vertical axis, find the magnitude of the crankshaft's angular acceleration
Illustrate what are some pros and cons of the kitchen-sink reporting model? Illustrate what are some pros and cons of the minimalist reporting model? Explain and give examples for both.
A 10.0-m long string is moved up and down with simple harmonic motion with a frequency of 33 Hz. Determine the velocity of the wave on the sting
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
The position of a particle moving with constant acceleration is given by x(t) = 6t2 + 6t + 4, Calculate the average velocity of this particle between t = 6 seconds and t = 10 seconds
A copper rod 25 cm long having a cross-sectional area of 7.5 cm2 is used to connect a boiler maintained at 100 oC to a large block of ice at 0 oC. What is the rate of change in entropy of the ice
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