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A helicopter lifts a stretcher with a 74 kg accident victim in it out of a canyon by applying a vertical force on the stretcher. The stretcher is attached to a guide rope which is 50m in long and makes an angle of 37 degrees with respect to the horizontal.
A. what is the minimum amount of work that the helicopter needs to do to lift the injured person and stretcher to its cockpit.
B. If the operation takes 10 seconds, what power is deliever by the helicopter in J/sec? In horsepower?
A 16.0-kg projectile is fired at an angle of 60.0° above the horizontal with a speed of 86.0 m/s. How far from the point of firing does the other fragment strike
Capacitors C1 = 5.80 µF and C2 = 2.40 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
An unstable particle is at rest and suddenly breaks up into two fragments. No external forces act on the particle or its fragments. What is the velocity of the more massive fragment
The length of a simple pendulum is 0.79 m, and the mass of the bob at the end of the cord is 0.24 kg. What is the angular frequency of the motion
A Michelson interferometer uses light from glowing hydrogen at 486.6nm. As you move one mirror, 555 bright fringes pass a fixed in the viewer
A small steel ball bearing with a mass of 17.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.25 m. Calculate the horizontal distance the ball would travel
A 1290-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1805-N crate hangs from the far end of the beam. find the magnitude of the tension in the wire
An electric field given by = 7.4· - 4.4(y2 4.7)· pierces a Gaussian cube of edge length 4.0 m, What net charge (in Coulombs) is enclosed by the Gaussian cube
The distance between the lenses in a compound microscope is 18 cm. The focal length of the objective is 1.5 cm. what must be the focal length of the eyepiece
You make a plot of displacement (Y ? Y0) in meters versus spring force (Fs) in Newtons for the data you have collected in lab and use LoggerPro to fit a line to your data. Calculate the spring constant and its uncertainty
A space probe accelerated uniformly from 50 m/s at t = 0 to 150 m/s at t = 10 sec. How far did it move between t = 2.0 sec and t = 6.0 sec
Two traveling sine waves, identical except for a phase difference of phi, What is the phase difference between the two waves
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