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An 18kg object is pulled 7.50m along a horizontal surface with a 120N force acting at 50 degrees above the horizontal. uk = 0.450
1. Determine the work done on the object by each force acting on the object.
2. Determine the net/total work done on the object.
A 5.00 m long uniform ladder leans against a smooth wall and its base rests on a rough floor. The ladder has a mass of 18.0 kg and its base is a distance of 2.30 m from the wall. A person of mass 80.0 kg climbs 2.50 m up the ladder. If the ladder ..
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
How much time is neccesary to stop the crate. A block with mass m = 5.5 kg slides down an inclined plane of slope angle 10.9 ° with a constant velocity. It is then projected up the same plane with the initial speed 3.85 m/s. How far up the incline ..
Two adjacent resonant frequencies of an organ pipe are found to be 500 Hz and 600 Hz. What is the length of the pipe
Early black-and-white television sets used an electron beam to draw a picture on the screen. What is the speed of electrons in the beam
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.3L in the warm store at 76?F. By how much has the volume decreased in liters
A magnetic field and an electric field, in separate regions of space, have strengths of 1.25 T and 1.25 N/C, respectively. What is the energy density of the magnetic field
A voltage V is applied to the primary coil of a step-up transformer with a 3:1 ratio of turns between its primary and secondary coils. A resistor R connected to the secondary dissipates a power P = 100 W. How much power is dissipated by the same r..
A 300 g oscillator has a speed of 95.4 cm/s when itsdisplacement is 3.0 cm, What is the oscillator's maximum speed
An ideal gas initially at 20°C and 199 kPa has a volume of 3.40 L. It undergoes a quasi-static, isothermal expansion until its pressure is reduced to 94 kPa. (a) Find the work done by the gas. J (b) Find the heat added to the gas during the expans..
Consider the circuit in the figure below with resistors R1 = 2,400 ?, R2 = 4,400 ?, and R3 = 1,100 ?, What is the magnitude of the current in the circuit
q1. a proton is travelling to the right at. it has a head-on perfectly elastic collision with a carbon atom. the mass
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