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Resistance to the motion of an automobile consists of road friction, which is almost independent of speed, and air drag, which is proportional to speed-squared. For a certain car with a weight of 12000 N, the total resistant force F is given by F = 300 + 1.8v2, with F in newtons and v in meters per second. Calculate the power (in horsepower) required to accelerate the car at 0.90 m/s2 when the speed is 84 km/h.
A 0.157kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time.
If the exospheric temperature is 1500 K and the hydrogen atom and helium atom densities at 500 km are 10^4 cm^3 and 10^6 cm^3 respectively,
The masses of the particles are m1 = m3 = 5.0 kg and m2 = m4 = 8.0 kg. Find out the moment of inertia of the system about the z axis.
What is the highest compression of the spring for a perfectly inelastic impact.
A small plane tows a glider at constant speed and altitude. If the plane does 2.09 105 J of work to tow the glider 130m, what is the angle between the tow rope and the horizontal
If both the ring and the rod are warmed together, what temperature must they both reach so that the ring barely slips over the rod.
An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. What is the magnifying power of the telescope he can construct with these lenses
The loaded cab of an elevator has a mass of 3.00 multiplied by 103 kg and moves 171 m up the shaft in 23s at constant speed. At what average speed does the force from the cable do work on the cab?
A large capacitance of 2.00 mF is needed for a certain application. Calculate the volume of Teflon alone in the capacitor
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
question traveling at a speed of 17.3 ms the driver of an automobile suddenly locks the wheels by slamming on the
A 3.0 microcoulomb point charge is placed in an external uniform electricfield of 1.6*10^4 N/C. At what distance from the charge is the netelectric field zero
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