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A 15.0 kg box initially sits at the bottom of a frictionless ramp. It is pulled by a cable to the top of the ramp, which is 2.5 m higher than the bottom of the ramp, and brought to a stop. How much work does each force acting on the box do during the lift?
A car drives 5.0 km north, then 7.3 km east, then 6.7 km northeast, all at a constant velocity. If the car had to perform 2.6 × 106 J of work during this trip, what was the magnitude of the average frictional force on the car
When an aircraft returns to the aircraft carrier and lands, it goes from 273.2 miles per hour to 0 miles per hour in 4 s. Obtain the acceleration in this case
A hockey puck slides with an initial speed of 31 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.030, What is the speed of the puck after 17 s
A string is stretched and fixed at both ends 426 cm apart. If the density of the string is 0.022 g/cm, and its tension is 441 N, what is the speed of the traveling waves
A straight horizontal pipe with a diameter of 1.0 cm and a length of 53 m carries oil with a coefficient of viscosity of 0.11 N · s/m2. Find the gauge pressure at the pipe input
A 1500 lb car traveling 80 miles per hour due west is struck by lightning and charged with and enormous negative charge. determine how much charge is there on the car
A 10 volt AC voltage source is connected to a transformer with 2 primary coils and 4 secondary coils. The output of the first transformer is connected to the input of another transformer with 8 primary coils and 16 secondary coils as shown below. ..
a lawnmower has a six horsepower engine 1hp750w. the engine had an efficiency of 20. the throttle is set so that the
An object of mass M = 2.00 kg is attached to a spring withspring constant k = 88.0 N/m whose unstretched lengthis L = 0.100 m, and whose far end is fixedto a shaft that is rotating with an angular speed of omega = 2.00 radians/s
Three astronauts, propelled by jet backpacks, push and guide a 115 kg asteroid toward the processing dock, exerting the forces, with F1 = 34 N, F2 = 57 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°
A disk with mass m = 6.0 kg and radius R = 0.41 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.26 m from the rope and at a frequency f = 18.0 rev/s (with a direction shown by the arrow). 1) What is the mag..
A shaft 100 mm diameter (D) runs in a bearing 200 mm long (L). The two surfaces are separated by an oil film 2.5 mm thick (c). Take the oil viscosity (miu) as 0.25 kg/ms.If the shaft rotates at a speed of (N) revolutions per minute. a) Show that the ..
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