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A student gets his car stuck in a snow drift. Not at a loss, having studied physics, he attaches one end of a stout rope to the vehicle and the other end to the trunk of a nearby tree, L = 26m away, allowing for a small amount of slack, W = 0.980m. The student then exerts a force F on the center of the rope in the direction perpendicular to the car-tree line, If the rope is inextensible and if the magnitude of the applied force is 576N, what is the force on the car?
A steel wire of length 2.08m with circular cross section must stretch no more than 0.220cm when a tensile (stretching) force of 410N is applied to each end of the wire. What minimum diameter dmin is required for the wire
A grasshopper hops along a level road. On each hop, the grasshopper launches itself at angle θ0=45° and achieves a range R = 0.82m .What is the average horizontal speed of the grasshopper as it hops along the road? Assume that the time spent o..
A ball of mass M and radius R starts from rest at a height of h = 1.73 m and rolls down a ? = 25.8° slope, What is the linear speed of the ball when it leaves the incline
when an ambulance is stationary the siren gives off a sound at a frequency of 500 hz. in answering the following
The third-order fringe of 650 nm light is observed at an angle of 30°, How far apart are the slits
a 98-g piece of copper is heated in a furnace to a temperature tc. the copper is then inserted into a 150-g copper
A square of side "a" has a charge "+Q" at each corner. What is the electric potential energy of this system of charges?
An elevator with a mass 2000kg rises with an acceleration of 1m/s^2. What is the tension in the supporting cables
What is the drag force on a 1.6 m wide, 1.4 m high car traveling at 11 m/s (25 mph)? Suppose that the density of air is 1.2 kg/m3
A torpid consisting of 500 loops of wire carries a current of 3.25 Amp. Obtain the strength of the magnetic field at the outer radius of the torpid
the 150 turn primary coil of a transformer is connected to a 120 V AC source. Find the current in the primary coil
A microscope has an objective lens with a focal length of 2.0cm, an eyepiece with a focal length of 0.25 cm, What is the magnification of the microscope
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