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A 1170 kg block of granite is pulled up an incline with l = 40.0 m at a constant speed of 1.76 m/s by a steam winch. The coefficient of kinetic friction between the block and incline is 0.40 and the height h of the incline is 30.0 m. What is the power of the winch?
A particle moves along the x axis. Its position is given by the equation 2.00 + 3.00t - 4.00t^2 with x in meters and t in seconds. Find out (1) its position at the instant it changes direction and (2) its velocity when it returns to the position i..
Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7A; the other carries a smaller current I in the opposite direction. The two wire unit is placed at an angle of 78..
A photon has an energy E and wavelength (lamda) before scattering from a free-rest electron. FInd the initial wavelength and the initial energy of photon
The student throws a ball into the air along a path that he judges to make an initial angle of 59° with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes ball to rise verticall..
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 26.7 m/s. Find the airplane\'s acceleration
A 30-kg child rides on a circus Ferris wheel that takes her around a vertical circular path with a radius of 20 m every 22 s. What is the magnitude of the resultant force on the child
q1. 150 grams of boiling water temperature 100 c heat capacity 4.2 jgramk are poured into an aluminum pan whose mass is
An infinitely-long, uniformaly charged line of charge with linear charge density x=0.1_C/m lies a distance d=0.068_m from the center of a sphere with radius R = 0.23_m. What is the amount of charge inside the sphere
Two ambulances move toward each other on a straight road. Each travels at a speed of 65 mph. The siren on each ambulance produces a sound wave of frequency 460 Hz. (Take the speed of sound in air to be 340 m/s.)
By what factor will the rms speed of gas molecules increase if the temperature is increased from 40 ?C to 150 ?C
A very fast-moving train car passes you, moving to the right at 0.50c. You measure its length to be 12m. How long does David measure the train car to be
The rotational velocity of a merry-go-round increases at a constant rate from 0.6 rad/sec to 1.8 rad/s in a time of 4 s. find the rotational acceleration of the merry-go-round
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