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When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 77.5 kg man just before contact with the ground has a speed of 6.22 m/s. In a stiff-legged landing he comes to a halt in 2.08 ms. Calculate the average net force that acts on him during this time.
Sound propagating through air at 30oC passes through avertical cold front into air that is 4.0oC. If the soundhas a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 32.7 rad/s. Find the angular displacement of the tub
An ideal gas occupies a volume of 2.85 m3 at STP. The pressure of the gas in increased to 3.71 atm. Calculate the new volume of the gas
Suppose two parallel conducting plates are separated by 0.45 cm of air. Find the maximum potential difference between the two parallel conducting plates in kV
determine the downward force of the rails on the car when the upside-down car is at the top of the loop
If the electric field is zero in some region of space, the electric potential must also be zero in that region. The value of the electric potential can be chosen to be zero at any convenient point. In electrostatics, the surface of a conductor is an ..
An object moves uniformly around a circular path of radius 22.0 cm, making one complete revolution every 1.80 s. What is the translational speed of the object
A 60.0 kg woman stands at the rim of a horizontal turntablehaving a moment of inertia of 500 kgm^2 and a radius of 2.00m. How much work does the woman do to set herself and theturntable into motion
A computer to be used in a satellite must be able to withstand accelerations of up to 27 times the acceleration due to gravity. What is the minimum amplitude of vibration
A 1.56m tall student stands before a vertical mirror. She can just see her whole body, from head to toe. How tall is the mirror
A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. What is his predicted landing velocity
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