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A 60 kg trunk is pushed 4.0 m at constant speed up a 30° incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is 0.20.
Calculate the work done by the applied horizontal force.
Calculate the work done by the weight of the trunk.
How much energy was dissipated by the frictional force acting on the trunk?
A typical lightbulb in your house is rated 200 W, which means that the bulb dissipates 200 W when connected to a DC voltage of 110 V. What is the current through the lightbulb
The kinetic energy of an object is increased by a factor of 7, by what factor is the magnitude of its momentum changed
An aircraft?weighing 971?N? is accelerated?at 9.1 m/s2 for 5 seconds, at which time the aircraft launches. What is the force required to launch the aircraft
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
Estimate the electron drift velocity. Estimate the current density. Estimate the electric field in the wire.
An electromagnetic wave in a vacuum has a maximum magnetic field amplitude of 5.67×10?7 T. find the maximum electric field amplitude of the wave
Suppose a 20 kg ball moving at 5 m/s collides with a 100 kg ball moving at 3 m/s. How much kinetic energy was lost in the collision
a sound wave traveling in 26 degrees C air has a pressure amplitude of 0.500 Pa. (assume that the density of air is 1.29 kg/m^3). What is the intensity of the wave
Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. How much sound energy comes through the window in one hour
A charged capacitor is connected to an inductor. At time t=0 the charge on the capacitor is Q= 6uC. What is the amplitude of the current at that same instant
What is electric field in the wire
An archer shoots an arrow horizontally at a target 17m away. The arrow is aimed straight at the center of the target, but it hits 59cm lower.
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