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You are riding in an elevator that is traveling down .It travels at vo=6m/s downward. Then, over two seconds, it slows to a stop.
1. What normal force does the person feel as the elevator decelerates? (Mp=75kg)
2. What is the acceleration of the elevator? What about the person? (Direction and magnitude)
3. If the elevator has the mass of 300 kg (by itself) what is the tension on the rope as it decelerates?
A light source of wavelength λ illuminates a metal and ejects photoelectrons with a max KE of 1.00eV, Find what is the work function of the metal
Determine the angular displacement in radians that the minute hand of a watch moves through from 3:15 A.M. to 7:30 P.M. the similar day
A projectile is shot straight up from the earth's surface at a speed of 1.20×10^4 km/hr. How high does it go
A carnot engine operates between a hot reservoir at 310 K and a cold reservoir at 280 K. If it absorbs 500 J of heat at the hot reservoir, how much work (in joules) does it deliver?
Proton projected toward fixed nucleous of charge +Ze with velocityv0. Initially the particles are very farapart. When proton is at a distance R from the nucleous itsvelocity is 1/2v0.
A bungee jumper has a mass of 68 kg. If he jumps off a bridge that is 200. m high and uses a bungee cord that is 75 m long with a spring constant of 20. N/m
A relief airplane is delivering a food package to a group of people stranded on a very small island. What is the velocity of the plane if the pilot successfully drops the package from a horizontal distance, D, equal to 600 m from the site
Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a resistance of 0.874 ohm. What is the resistance of the copper wire? Take the resistivity of copper to be 1.72 times 10-8 ohm m, and that of aluminum to be..
The bright core of a certain Seyfert galazy had a luminosity of 10^10 L. The luminosity increased by 100% in a period of 18 months. How does this compre to the diameter of the Milky Way
A block of aluminum weight 140.0 g is cooled from 98.4 degrees celcius to 62.2 degrees celcius with the release of 1080 J of heat. From this data calculate the specific heat of aluminum
Try rubbing a plastic pen through your hair, and you'll discover that you can pick up a tiny scrap of paper when the pen is about one centimetre above the paper. From this simple experiment you can estimate how much an atom in the paper is polarized ..
An ore sample weighs 17.50 in air. When the sample is suspended by alight cord and totally immersed in water, the tension in the cord is11.20 Newton. Find what is the density of the sample
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