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A tractor pulls a sled a distance of 30 meter along level ground. The total weight of the sled and load is 22,050 Newton. The tractor exerts a constant 8,000 Newton force at an angle of 36.9o above the horizontal. A 5,00 Newton friction force opposes the sled's motion:
a) Determine the work done by friction?
b) Determine the work done by gravity?
c) Determine the work done by the tractor?
d) Determine the speed of the sled after it moves 30 meter?
In 2.0 minutes, a ski lift raises four skiers at a constant speed to a height of 140 m. What is the average power provided by the tension in the cable pulling the lift
Structure Polar's acquisition problem as a decision tree and solve (using EMV criteria) for the optimal decision strategy for Polar.
A laser used to repair a detached retina has wavelength of 532nm. How many photons are in each pulse
Two strings identical in length and made of the similar material are subjected to tensions in the proportion of 1 to 4; If they vibrate at the equal frequency, explain how do their diameters compare
a what is the probability that an electron will tunnel through a 0.50-nm air gap from a metal to a scanning tunneling
A ray of light enter a light fiver at an angle of 15 degreeswith the long axis of fiver. calculate the distance the light raytravels between successive reflections off the sides of the fiber.the fiber has an index of refraction of 1.6 and 10^-4 m ind..
The electron in a hydrogen atom orbits the proton at a radius of 0.053 nm. What is the electric field due to the proton at the position of the electron
A nucleus moving at 0.6c through the lab decays, emitting a photon in the forward direction. With what speed does the photon travel
When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver, What are the magnitude and direction of his acceleration
You are at the controls of a particle accelerator, sending a beam of 3.00×107 protons (mass ) at a gas target of an unknown element. Find the mass of one nucleus of the unknown element
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
Two particles are in a uniform electric field whose value is +2500 N/C. The mass and charge of particle 1 are m1 = 1.20 x 10-5 kg and q1 = -6.99C, while the corresponding values for particle 2 are m2 = 2.94 x 10-5 kg and q2 = +18.0C.
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