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An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, but survived with only minor injuries. Assume that the pilot's mass was 79 kg and his terminal velocity was 50 m/s. Model him as a particle.
a) Estimate the work done by the snow in bringing him to rest.
b) Estimate the average force exerted on him by the snow to stop him.
c) Estimate the work done on him by air resistance as he fell.
Two identical positive charges exert a repulsive force of 7.4 x10-9 N when separated by a distance of 4.8 10-10 m. compute the charge of each.
It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). What is the angular speed of the earth
Consider two capacitors in air each with a capacitance C, both capacitors then were filled with liquid having a dielectric constant k, What is produced heat
A Carnot engine whose high-temperature reservoir is 400K takes in 520 J of heat at this temperature in each cycle, compute the temperature of the low-temperature reservoir
A string is clamped at both ends and tensioned until its fundamental vibration frequency is 95Hz. what is the lowest frequency at which it will vibrate
From street level, Superman spots Lois Lane in trouble-the evil villain, Lex Luthor, Determine how long Superman takes to reach her
Suppose that you hear a clap of thunder 18.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 x10^8 m/s. How long are you from the lightning stroke.
A 0.200 kg block is placed on a vertical spring (k = 5.00x10^3) and pushed downward, compressing the spring 0.100 m. As the block is free, it leaves the spring and continues to travel upward. What height above the point of release would block reac..
A small ball with a mass of 49.0g and a charge of ?0.170?C is suspended from the ceiling by a string. What is the tension in the string when the second ball is directly beneath the first ball
A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a thin section of a sphere. How far is her face from the hubcap
Three point charges are arranged along the x axis. Charge q1= -4.70 nC is located at x= 0.200 m and charge q2 = 2.20 nC is at x = -0.340 m. A positive point charge q3 is located at the origin.
To which, according to the rotational analog of Newton's second law, is the angular acceleration experienced by an object directly proportional?
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