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A loaded 375 kg toboggan is traveling on smooth horizontal snow at 4.50 m/s when it suddenly comes to a rough region. The region is 5.40 mlong and reduces the toboggan's speed by 1.20 m/s .
a) What average friction force did the rough region exert on the toboggan?
b) By what percent did the rough region reduce the toboggan's kinetic energy?
c) By what percent did the rough region reduce the toboggan's speed?
A light ray passes from water into air. The angle of incidence is 37o. Find the angle of refraction in the air
A bell is ringing inside of a sealed glass jar that is connected to a vacuum pump. Initially, the jar is filled with air. What does one hear as the air is slowly removed from the jar by the pump?
The analyzer is rotated by 35 degrees. Discover the fraction of light transmitted. If the analyzer is left as it was initially, and a second filter is inserted at an angle of 35 degrees with the polarizer, what fraction passes the analyzer?
Suppose a block of mass 5 kg is resting on a horizontal surface and coefficient of static friction between block and surface is 0.2. What is the reaction on the block by the vertical wall
On a calm, bright day, you're scuba diving in a deep lake (n = 1.35), 5.40 m away from your sailboat in the horizontal direction. Calculate the height of the mast
One goal of the Russian space program is to illuminate dark northern cities by sunlight reflected to the Earth from a 200 m diameter mirrored surface in orbit. Some smaller prototypes have already been constructed and put into orbit.
Determine the magnitude of the normal force that (a) the floor exerts on the crate and (b) the crate exerts on the person.
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m is set into oscillatory motion with an amplitude of 20.0 cm. What is the weight of the bananas in newtons
What would be rockets speed after travelling the distance if it weren't tied down to the spring.
A ball is shot from the ground into the air. At a height of 10.60 m, the velocity is observed to be v = (8.60 m/s) i + (6.50 m/s) j
An engine transfers 2.5 X 103 J of energy from a hot reservoir during a cycle and has an efficiency of 0.3. How much heat is transferred as exhaust to a cold reservoir
A person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 27.6 dB. What is the intensity delivered to the eardrum
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