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An airplane pilot fell 365 m afterjumping from an aircraft without his parachute opening. He landedin a snowbank, creating a crater 1.3 mdeep, but survived with only minor injuries. Assuming the pilot'smass was 75 kg and his terminal velocitywas 50 m/s, estimate the following.
(a) the work done by the snow in bringing him to the rest.
(b) the average force exerted on him by the snow to stophim.
(c) the work done on him by the air resistance as he fell.
a spring with a spring constant of 120 nm lies on a horizontal frictionless table. the spring is attached to a 1.5-kg
A mercury thermometer is free of all markings. The thermometer is placed in an ice bath. When the thermometer is in equilibrium with the ice bath the position of the mercury column is marked on the glass. The thermometer is then placed in boiling ..
A cart of mass m, moves with a speed v on a frictionless air track and collides with an identical cart that is stationary. what is the final kinetic energy of the system
What is the magnitude T of the tension force acting on one edge of the section while the internal bladder pressure is 2700Pa and each of the four tension forces is directed 6.4° below the horizontal.
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.60 10-10 T. How much energy does this wave carry through the window
A box full of books rests on a wooden floor. The normal force the floor exerts on the box is 236 N. (a) You push horizontally on the box with a force of 129 N, but it refuses to budge.
Assume that sunlight at the surface of Earth has an average intensity of 1.15E+3 W/m2. Calculate the rms value of the magnetic field in the sunlight
Suppose one night that the radius of the earth decreased by two (was half as big as normal), What would be the new value for the free fall acceleration
A copper cable is designed to carry a current of 340 A with a power loss of 4.80 W/m. What is the required radius of this cable
A 1.9-kg mass attached to a spring is displaced 7.6 cm from the equilibrium position. What is the energy of the motion when the mass passes through the equilibrium position
A negatively charged ion moves due north with a speed of 1.2×106 m/s at the Earth's equator. What is the magnetic force exerted on this ion?
A long solenoid that has 1,190 turns uniformly distributed over a length of 0.420 m produces a magnetic field of magnitude 1.00 multiply.gif 10-4 T at its center
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