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A sprinter of mass 72.8 kg runs at a constant speed of 10.8 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.4 m?
1. you are hired by an industry that owns a building with a floor area of 6 m by 10 m and a ceiling height of 4 m. the
A 9000-kg boxcar traveling at 16.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.00 m/s
A 40-kg pole vaulter running at 14 m/s vaults over the bar. Her speed while she is above the bar is 1m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 4.0 m due east. For the second putt, the ball travels 3.1 m at an angle 20° north of east. The third putt is 0.50 m due north. What disp..
An elevator and its load have a combined mass of 1450 kg, Find the tension in the supporting cable when the elevator, originally moving downward at 11 m/s
The emissivity of tungsten is 0.350. A tungsten sphere with a radius of 1.19 is suspended within a large evacuated enclosure whose walls are at a temperature of 285.0 . What power input is needed to maintain the sphere at a temperature of 2500.0 i..
An alpha particle (a helium nucleus) is traveling along the positive x-axis at 1350 m/s, How far does the particle travel before hitting the tube wall
A 1055 kg van, stopped at a traffic light, is hit directly in the rear by a 800 kg car traveling with a velocity of +2.00 m/s. What is the final velocity of each vehicle
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 5900 V/m, Calculate the radius r of the path for a singly charged ion
A two-slit pattern is viewed on a screen 1.12 m from the slits. what is the total width of the central bright fringe
q1. a train at rest emits a sound at a frequency of 1045 hz. an observer in a car travels away from the sound source at
A hanging copper wire with diameter 1.4mm (1.4e-3m) is initially 0.95 m long. Find the approximate value of the effective spring stiffness of the inter atomic force
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