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a 18.4kg box is moving due east at a constant velocity of 10.8m/s. compute the normal force exerted by the surface of the box.
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- A 7.1kg wooden box sits on a 2.9kg box which sits on a 3.8kg box. The 3.8kg box rests on a table top for 8sec. What is the normal force exerted on the 3.8kg box by the table top? Give the numerical value only.A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed ?esc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ?=2.93×106 g/m3 and volume ?=1.94×1012 m3 . Recall that the universal gravitational constant is ?=6.67×10-11 N·m2/kg2 .vesc = ? m/sA team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ? = 2.67 × 106 g/m3 and volume V =1.71 × 1012 m3. Recall that the universal gravitational constant is G = 6.67 × 10-11 (Nm2)/(kg2).
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- I am not sure how to work on this problem, the answers are Na=29.8N, Nb=8.12N. They gave a hint which says to find the acceleration of the system first.Zero, a hypothetical planet, has a mass of 5.0 * 102^3 kg, a radius of 3.0 * 10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial energy of 5.0 * 107 J, what will be its kinetic energy when it is 4.0 * 106 m from the center of Zero? (b) If the probe is to achieve a maximum distance of 8.0 * 106 m from the center of Zero, with what initial kinetic energy must it be launched from the surface of Zero?In Chapter 3 we saw that the electric forces acting between neighboring atoms behave very much like springs, with the spring stiffness being in the range of up to a few tens of Newtons per meter. Consider a molecule made up of two atoms of the same kind, each atom having a mass of 6.5 x 10-27 kg. Suppose that the center of the spring does not move, in which case you can model the motion of one of the atoms as that of a single atom connected to a half-length spring. If we should observe that a gas of these molecules emits photons whose energies are integer multiples of 2.4 x 10-2 eV, what would be the stiffness of the half-length "spring"? half-length k, = i N/m
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