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Brian is trying to pull Julie on a sled across a flat snowy field. Brian puls on a rope attached to the sled. Brian's pulling force is directed forward and upward at an angle of 30 degrees above horizontal. Julie's mass of 50kg, and the sled's mass is 8kg. If the coefficient of static friction between the sled runners and the snow is 0.10, how much force must Brian exert on the rope to start moving the sled?
What tension is necessary to tune string properly
Illustrate a new gravitational potential energy
A flashlight on the bottom of a 4-m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.70-m from the point directly above the flashlight. What angle (in air) does the emerging ray make with wat..
An ideal spring of negligible mass is 11.00cm long when nothing is attached to it, If you wanted to store 10.0 J of potential energy in this spring, what would be its total length? Assume that it continues to obey Hooke's law
Two narrow slits 55 micrometer apart are illuminated with light of wavelength 507nm. What is the angle of the bright fringe in degrees
a muon with half-life 1.52 micro secondsin its own frame travels 60 km. what is that distance in the frame of the muon
100.0 W tungsten filament bulb generates 95.0 W of heat, which dissipated through glass bulb which has radius of 3.00 cm and 0.500 mm thick. If thermal conductivity of glass is 0.836 W/m°C, determine difference in temp. between inner and outer sur..
Traffic is moving along the highway at 51 km/h on a rainy day. Illustrate what is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
A wheel of radius 0.390 m starts from rest and accelerates uniformly to an angular speed of 17.0 rad/s in 4.00 s. Calculate the angular displacement of the wheel
A 40 kg child sits 1.3 m away from the center of a merry-go-round. If the merry-go-round is traveling with a radial velocity of .78 rad/s, what is the centripetal force on the child
It walks 2.4m along the boat toward shore and the nstops Assuming no friction between the boat and the water, find out how far the dog is then from the shore
A 12.0 resistor is made from a coil of copper wire whose total mass is 20.0. What is the diameter of the wire and How long is it
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