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An archer launches an arrow horizontally at 40 m/s from the top of a tower, striking the ground 80 meters from the base of the tower.
a) How tall is the tower?
b) What is the horizontal component of the final velocity just before landing?
c) What is the vertical component of the final velocity just before landing?
d) What is the angle of impact?
A piano weighing 600 lb is to be raised to a platform 4 ft high through a plank 10 ft long. If the coefficient of friction is 0.30, what force parallel to the plank will be needed?
A circular loop in the plane of a paper lies in a 0.55T magnetic field pointing into the paper. The loop's diameter changes from 23.0cm to 6.2cm in 0.47s. What is the magnitude of the average induced emf
A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s in the x direction along the line y = 5. What is its angular momentum (in kg×m2/s) relative to the origin
Two 1.0M-Hz radio antennas emitting in-phase are separated by 600m along a north-south line. A radio receiver placed 2.0 km east is equidistant from both the transmitting antennas and picks up a fairly strong signal. How far north should that rec..
Two vectors have length V1 = 3.5 km and V2 = 4.0 km. What are the maximum and minimum magnitudes of their vector sum
q1. a 4.5 kg block starts at rest and slides a distance d down a frictionless 32.0 degree incline where it runs into a
What is the minimum pressing force that must be used.
the west antarctic ice sheets some 0.83 million km2 and only 6 of the total antarctic ice surface have an average
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
a skier of mass 105 kg travels down a ski trail of height 240m. if the skier has a speed of 40 ms at the bottom of the
Two circular hoops, with masses and radii in the ratios m2/m1=4 and R2/R1=4, rotate with angular speeds in the ratio ?2/?1=2. What is the ratio of the kinetic energies K2/K1
The ems of an AC circuit has an rms value of 120V. What is the maximum positive emf
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