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A person of mass 50 kg stands on an accurate scale(that reads force in Newtons) in an elevator
A) Draw a free body diagram showing all of the forces acting on the person
B) What is the scale reading if the elevator is at rest
C) What is the scale reading if the elevator is moving upwards with a constant speed of 9.8 m/s.
D) What is the scale reading if the elevator is moving upwards with a speed of 3 m/s but is slowing down atthe rate 2.8 m/s2.
E) What is the scale reading if the elevator momentarily has zero velocity but is accelerating downwards at the rate of 9.8 m/s2?
Tarzan spies a 35 kg chimpanzee in severe danger, so he swings to the rescue. What are the frequency and amplitude (in degrees) of Tarzan's swing
Suppose a planet is discovered orbiting a distant star with 11 times the mass of the Earth and 1/11 its radius. How does the escape speed on this planet compare with that of the Earth
As shown on the right, a uniform boom with a mass of 30.0 kg and a length of 2.00 meters is suspended at its left end by a low friction bearing and supported at its right end by a low mass horizontal steel wire of diameter 4.00 mm. A 20.0 kg mass ..
A train is traveling up a 4.6° incline at a speed of 3.27 m/s when the last car breaks free and beginsto coast without friction. How long does it take for the last car tocome to rest momentarily
An 84.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of nylon that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
A jet flying at 107 m/s banks to make a horizontal circular turn. The radius of the turn is 3810 m, Calculate the magnitude of the necessary lifting force
A diffraction grating has a spacing of 350 lines per mm and sits L = 47.7 cm from a screen. what is the wavelength of the laser
For NaCl compute (a) the energy in eV necessary to excite the first rotational state and (b) the wavelength and frequency of the photon emitted in the transition back to the ground state
A 31.5 cm focal length converging lens is 20.0 cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
The drawing shows two situations in which charges are placed on the x and y axes. They areall located at the same distance of 2.5 cm from the origin O. Foreach of the situations in the drawing, determine the magnitude of the net electric field at the..
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much work is done by the device on the gas
a skier is pulled up a slope at a constant velocity by a tow bar. the slope is inclined at 25.5deg with respect to the
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