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A ski starts from rest and slides down a 25° incline 70 m long. Use energy methods.
(a) If the coefficient of friction is 0.09, what is the ski's speed at the base of the incline?
(b) If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level?
) If the pressure of the 2.2-cm3 volume is reduced to 1.2 10-11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container
A 77.5-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is accelerating upward with an acceleration of 2.46 m/s2
two masses m1 and m2 move in a plane and interact by potential energy U(r)=1/2kr^2. write down their Lagrangian in terms of the CM and relative position R and r, and find the equations of motion for the coordinates X,Y,x,y. Describe the motion and fi..
an object mass 10.0 kg slides upward on a slippery vertical wall. a force f of 60n acts at an angle of 60 degrees.
To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 14cm in diameter and 55cm in length, What is the total length of wire you will need to meet these specifications
An object is placed to the left of a convex lens and on the optical axis. evaluate the magnification of the image formed by the lens
A resistance R and a 3-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
consider an annular disk in the xy plane centered on the origin. an annular disk is a disk with a hole missing from the
A car travels at 35.0 m/s for 40.0 minutes and then travels at 55.0 m/s for 20.0 minutes. What is the average velocity of the car
An analysis of each gas and their mole percent from the analysis of a flue gas is given below: Determine the average molecular weight of the flue gas.
A 5.00kg sack of flour is lifted vertically at a constantspeed of 3.50m/s through a height of 15.0m. How much work is done on the sack by the lifting force
A bumper car with mass m1 = 116 kg is moving to the right with a velocity of v1 = 5 m/s. A second bumper car with mass m2 = 96 kg is moving to the left with a velocity of v2 = -3.8 m/s. The two cars have an elastic collision. Suppose the surface is f..
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