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A 65-kg bicyclist rides his 8.8-kg bicycle with a speed of 14 m/s.
a) What is the magnitude of the braking force?
b) How far does the bicycle travel if it takes 4.0 s to come to rest?
c) How much work must be done by the brakes to bring the bike and rider to a stop?
A very slippery ice cube slides in a vertical plane around the inside of a smooth, 20 cm diameter horizontal pipe. Find an algebraic expression for the ice cube's speed
They should have opposite magnitudes. They should have equal magnitudes. Their x-components should be equal. They must be parallel (point in the same direction). They should be anti-parallel (point in opposite directions). Their y-components should b..
an electron with an initial speed of 4.50times105 rm ms is brought to rest by an electric field. what was the potential
A heat engine operates between a reservoir at 28°C and one at 432°C. What is the maximum efficiency possible for this engine
A point charge of -12 micro-coulombs is fired directly towards a single infinite sheet of charge. It is initially moving at 3.4 m/s towards the sheet and after it has traveled 0.7 meters it is moving at 18.4 m/s.
A common flashlight bulb is rated at 0.108 A and 3.28 V (the values of current and voltage under operating conditions). estimate the temperature of the tungsten filament
A cylinder rolls down a ramp of height h = 1.1 m with ? = 36°, starting from rest at the top. How long does it take to reach the bottom of the ramp
Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, What percentage is the earth's speed around the sun
the lowest pressure attained in a "vacuum" in a laboratory on the earth is 1X10^-17 atm at a termperature of 4.1 K. what is the number of molecules per cubic centimeter in this vacuum
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 473 m/s
A 6.0-uF air capacitor is connected across a 100-V battery. Afterthe battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectricconstant = 4.5).
An electromagnetic plane wave at a certain location has an electric field pointed up which is given as a function of time as E = 54 V/m × sin (6x106 Hz × t). What is the Poynting vector at this location for this wave as a function of time
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