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A 100.0 kg bungee jumper steps off a bridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 13.0 m. She reaches the bottom of her motion 38.0 m below the bridge before bouncing back. Her motion can be separated into an 13.0 m free-fall and a 25.0 m section of simple harmonic oscillation. (a) For what time interval is she in free-fall? 1 s (b) Use the principle of conservation of energy to find the spring constant of the bungee cord. 2 Your response differs from the correct answer by orders of magnitude. N/m (c) What is the location of the equilibrium point where the spring force balances the gravitational force acting on the jumper? Note that this point is taken as the origin in our mathematical description of simple harmonic oscillation. 3 m below the bridge (d) What is the angular frequency of the oscillation? 4 rad/s (e) What time interval is required for the cord to stretch by 25.0 m? 5 s (f) What is the total time interval for the entire 38.0 m drop? 6 s
The person pushes the crate a distance of 12 m as measured along the ramp. Find the work done by gravity on the crate
In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped int..
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
The walls of a blackbody cavity are at a temperature of 27 degrees C. find the frequency of the radiation of maximum intensity
three electric charges QA=q,QB=-q and Qc=-2q are located at the points A(x=+a,y=0),B(x=-a,y=0) and c(x=0,y=+2a) respectively. what is the value of the electric potential at the origin
An arrow is fire with a speed of 20m/s at the block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it.
Nichrome wire is used in some radiative heaters. What power will it draw when first switched on
A dynamite blast at a quarry launches a rock straight upward, and 2s later it is rising at a rate of 15m/s. assume air resistance has no effect on the rock, analyse its speed (a) at launch and (b) 5s after launch.
A jet flying at 125 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, Calculate the magnitude of the necessary lifting force
A truck can move up a road having a grade of 1.0-ft rise every 50-ft with a speed of 15 mi/h. how fast will the same truck move down the hill
What is the frequency of the string.
A(n) 331 g object is attached to a spring and executes simple harmonic motion with a period of 0.294 s. The total energy of the system is 1.7J. Find the force constant of the spring. (N/m) Find the amplitude of the motion (in cm)
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