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a worker pushes a 160kg cargo box on a horazontal frictonless surface with a constant force of magnitude. at 6s the box was moving at 1.8km/h. a second worker joins in at that time and supply's ab additional force of mag F2. after another 9s the cargo is moving at 9km/h. find both forces exerted by both the workers
Two Earth satellites, A and B, each of mass m=950kg, are launched into circular Orbits around the Earth’s center. Satellite A orbits at an altitude of 4200 km, and satellite B orbits at an altitude of 12,600km. What are the kinetic energies of the t..
A little cat, Bella, walks in a straight line, which we shall call the x axis, with positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function..
In the rectangle in the drawing, a charge is to be placed at the empty corner to create the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) should be placed at the empty corner?
The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg, Use your knowledge of gravitation to determine the orbital speed of the shuttle's cargo
A basketball rolls without slipping down an incline of angle ?. The coefficient of static friction is ?s. Model the ball as a thin spherical shell. Find the frictional force acting on the ball
A certain FM radio tuning circuit has a fixed capacitor C = 620 pF. Tuning is done by a variable inductance. Find what range of values must the inductance have to tune stations from 88 MHz to 108 MHz
If light is measured traveling through some medium at 0.90c, where c represents the speed of light in a vacuum, what is the index of refraction of the medium
Skiers ski down from the top of a mountain that is 580 meter above a valley. Find the gravitational potential at the top with respect to the valley
Two narrow slits 0.204 mm apart are illuminated by light of wavelength 580. nm. The light falls on a screen 1.48 m away from the slits. What is the angular seperation between adjacent maxima
A parallel-plate capacitor with circular plates of radius R is being charged. What is the radius R for the circular plate
Draw the circuit with the following criteria; double acting cylinder used for broaching holes into metal plates. The cylinder is 24" long mounted vertically, What is the minimum horsepower required by the prime mover
The speed of the fastest pitched baseball was 45 m/s and the ball's mass was 145g. how many joules of kinetic energy did it have
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