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An object falls at a rate of 100 ft/s immediately prior to the time that the parachute attached to it opens. The final descent rate with the chute open is 10 ft/s. Calculate and plot the speed of falling as a function of time from when the chute opens. Assume that the chute opens instantly, that the drag coefficient and air density remain constant, and that the flow is quasisteady.
A particle moves horizontally in uniform circular motion, over a horizontal xy plane. What are the coordinates of the center of the circular path
A .5Kg solid mass is totally submerged in water while suspended from a spring balance. Calculate the reading on the spring balance
Two 480g blocks of wood are 2.0 m apart on a frictionless table. A 9.0g bullet is fired at 440m/stoward the blocks. What is the speed of the second block after the bullet stops
A 4.0 kg block rests at the edge of a disk with a mass of 5.0 kg and a radius of 30 cm. A 2 N force is applied to the edge of the disk. What is the angular acceleration of the disk and block
A dump truck, with a mass of 2030 kg, moves at a constant speed 2.23 m/s along a horizontal track. What is the truck's speed after the loading is completed
If Young"s modulus for steel is 200 GN/m2 and that for concrete is 14 GN/m2, estimate the compressive stresses in the steel and concrete when the total thrust on the column is 1 MN.
In a tape recorder, the magnetic tape moves at a constant linear speed of 5.6 cm/s. What is the angular speed of the take-up spool when it is empty, with radius r1 = 0.64 cm
A rookie quarterback throws a football with an initial upward velocity component of 15.33 and a horizontal velocity component of 20.4. Overlook air resistance.
An electric ceiling fan with blades of diameter 0.760m is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s. What is the tangential speed of a point on the tip of the blade
an electron travels at a speed of 2.0 x 104 ms through a uniform magnetic field of strength 1.2 x 10-3 t. what is the
Unpolarized light passes through two ideal Polaroid sheets. The axis of the first is vertical and the axis of the second is at 31.0° to the vertical. What fraction of the incident light is transmitted
Two spaceships are launched from the Earth in opposite directions. All moves with the speed of .75c relative to the Earth. As we see it, what is the speed by which the distance among the spaceships increases? Does this contradict the special relativi..
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