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Problem: A 4.93 × 105-kg lunar landing craft is about to touch down on the surface of the moon, where the acceleration due to gravity is 1.60 m/s2. At an altitude of 284 m the craft's downward velocity is 15.7 m/s. To slow down the craft, a retrorocket is firing to provide an upward thrust.
Part A: Assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface.
I need help to find the magnitude of the thrust needed to reduce the velocity to zero.
In a certain region of space the electric potential from a given charge distribution can be represented by V= 3x2+2y+6 in units of volts. What is the associated electric field
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. (See the figure below (Figure 1) .) When the skater's hands and arms are brought in and wrapped arou..
The common isotope of uranium, 238U , has a half life of 4.50 x 109 years, decaying by alpha emission. a) What is the decay constant? b) What mass of uranium would be required for an activity of one Curie? c) How many alpha-particles are emitted p..
Three equal point charges, each with charge 1.35 mu C, are located at the vertices of an equilateral triangle whose sides are of length 0.60m. What is an electric potential energy U of the system? (Take as zero the potential energy of the three ch..
A laser beam of unknown wavelength passes through a diffraction grating having 5530 after striking it perpendicularly. At what angle will the next pair of bright spots occur
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A 1.0-cm-tall object is 60 cm in front of a diverging lens that has a -30 cm focal length, Calculate the image position
A trash can with a mass of 15 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. Determine the acceleration of the trash can as it moves
The speed of a bobsled is increasing because it has an accelerationof 2.4 m/s2. At a given instant in time, the forcesresisting the motion, including kinetic friction and airresistance, total 450N. The combined mass of the the ridersis 270kg
An electron is accelerated through a potential difference of 3.00 V before colliding with a metal target. What minimum-wavelength light can such an electron emit
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