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The mars rover curiosity is on its way to the landing area on mars. It will descend by using several stages of slowing down to achieve a soft landing. suppose the landing vessel that includes the rover and the rocket has a mass of 2500 kg, and that it starts the final slowing down at an altitude of 200 m above ground with downward speed 200 mi/h. The slowing is accomplished by the landing rockets firing toward the ground providing a back thrust. Calculate the thrust in newtons that is needed for curiosity to land on the martian surface at 1.7 mi/h. The acceleration due to the gravity on mars is 3.76 m/s^2.
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 15.6 m below the water level. Determine the speed at which the water leaves the hole
Two narrow slits, illuminated by light consisting of two distinct wavelengths, produce two overlapping colored interference patterns on a distant screen. What is the ratio of the two wavelengths
An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. what is the minimum allowed length for the runway
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 16.0 cm, find electric feild just outside paint layer
a 68.0 kg person throws a 0.0490-kg snowball forward with a ground of 29.0 m/s. What are the velocities of the two people after the snowball is exchanged
a satellite of a distant planet has a period of revolution around the planet of 3.89*10^5 seconds, determine the centripetal acceleration of the satellite
A system consisting entirely of electrons and protons has a net charge of 1.64×10?15C, How many electrons and protons are in this system
a capacitor is charged to a potential of 12.0 v and is then connected to a voltmeter having an internal resistance of
A 45.0 kg girl is standing on a 162 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A popcorn kernel initially at rest explodes into two pieces, one piece having twice the mass of the other. What is the ratio of the velocities of the fragments
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