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A hotel elevator ascends 273 meter with a maximum speed of 3.78 m/s. Its acceleration and deceleration both have a magnitude of 0.91 m/s2. Determine how long does it take to make the complete trip from bottom to top?
an infinite line of charge produces a field of magnitude 4.90 x 104 nc at a distance of1.9m. calculate the linear
A 426 kg bear grasping a vertical tree slides down at constant velocity. The acceleration of gravity is 10m/s2. What is the friction force that acts on the bear? Answer in units of N.
On a frozen pond, a 7 kg sled is given a kick that imparts to it an initial speed of v0 = 2.3 m/s. find the distance the sled moves before coming to rest
A ball is thrown straight upward. At 5.50 m above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain?
Calculate the self-inductance of a 55.0 cm long, 10.0 cm diameter solenoid having 1000 loops. How fast can it be turned off if the induced emf cannot exceed 3.00 V
A 50.0 kg object slides down a 30o angle slope from rest at a height of 12.0 m. What is the object's speed at the bottom of the slope
if a hydroelectric facility is to produce 100 000 hp with an elevation difference of 300 ft, what is a suitable speed (in rpm) if a kaplan turbine, operating at high efficiency, is used
After 10.7 s, a spinning roulette wheel has slowed down to anangular velocity of 2.25 rad/s. Determine the angular displacement of the wheel
A spacecraft of 140 kg mass is in a circular orbit about the Earth at a height h = 3RE. What is the spacecraft's kinetic energy
gold which has a density of 19.32 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into
A 900 kg car travelling east at 15 m/s collides with 750 kg travelling north at 20 m/s. what is the speed of the wreckage
the ideal gas law relates the temperature pressure and volume of an ideal gas.1 suppose the gas inside a particular
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