If the disk is moving with a velocity at point O of 15 ft/s and w= 2 rad/s, determine the velocity at A. A) 0 ft/s C) 15 ft/s B) 4 ft/s D) 11 ft/s V=15 ft/s
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- The mass of planet A is 81 times the mass of planet B. The distance between the centres of the two planets is 83 times the radius of planet A: R, = 5708.7 km.Find the centre of mass of the two-planet system. %3D [Recommended time : 10-12 minutes] O a. 5504.8 km O b. 11556.6 km O c. 5778.3 km O d. 5849.7 kmUniversal Gravitational Constant, G=6,6742867E-11 m3 kg / s2(Note that the exponent is negative)Radius of Earth, RE: 6,3781366E+06 mMass of Earth, ME: 5,9721426E+24 kg Two celestial bodies whose masses are m1 and m2 are revolving around their common center of mass and the distance between them is L. Assuming that they are both point masses, Find the angular speed, tangential speeds of the masses m1 and m2, and period of the motion. m1=7,27210x10^12kg m2=3,85280x10^11kg L=6,16500x10^8mGiven a radius r=2m and angular velocity of 15m/s. Calculate tengetial speed
- Question 1 a. Suppose the Sun contracts (collapses) to a pulsar with radius 15 km. Estimate the period of rotation of the pulsar. The period of revolution of the Sun about its axis is 25.38 days (1 day = 24 hours). Compare the kinetic energies of rotation of the pulsar and of the Sun. Figure 1: Question 1(a) A pulsar star system b. A wheel on an extremely low friction slanted surface will slide without rotating. However, if the same surface is rough and having some friction the wheel will roll down (with rotation). Explain why, using free body diagram.An Earth satellite has an elliptical orbit described by (as shown in the pic.) (All units are in miles). The coordinates of the center of Earth are (16,0). Solve, a. The perigee of the satellite’s orbit is the point that is nearest Earth's center. If the radius of Earth is approximately 4000 miles. Find the distance of perigee above Earth’s surface. b. The apogee of the satellite’s orbit is the point that is the greatest distance from Earth’s center. Find the distance ofthe apogee above Earth’s surface.The mass of planet A is 116 times the mass of planet B. The distance between the centres of the two planets is 125 times the radius of planet A : R, = 7016.9 km.Find the centre of mass of the two-planet system. %3D [Recommended time : 10-12 minutes] a. 14993.4 km b. 6460.0 km O c. 7496.7 km O d. 7561.3 km NEXT PAGE
- An extrasolar planet has mass 1.27E+25 kg and radius 67400000_m. What is the escape speed for this planet? 11440_m/s 12230_m/s 5014_m/s А. D. 16190_m/s В. Е. 1973_m/s С. F. 9206 m/sSuppose a 5.3×1010 kg meteorite struck the Earth at the equator with a speed 2.6×104 m/s, as shown in ( Figure 1) and remained stuck. By what factor would this affect the rotational frequency of the Earth (1rev/day)? Express your answer using two significant figures. Figure Earth 45° North Pole 1 of 1 | ΑΣΦ Submit Request Answer Provide Feedback ?A satellite of mass 200 kg is launched from a site on Earth’s equator into an orbit 200 km above the surface of Earth. a. What is the satellite’s speed before it’s launched (in m/s)? (Hopefully, it’s moving along with the surface of the Earth as the Earth rotates.) b. What is the satellite’s speed in its orbit (in m/s)? (Remember there is only onespeed a satellite can have in order to maintain a stable circular orbit with agiven radius.) c. Assuming a circular orbit, what is the orbital period of this satellite? (In other words, how long (in hours) does it take for the satellite to complete one orbit?) d. What is the minimum energy (work) necessary to place the satellite in orbit,assuming no air friction? (Remember, work is the amount of energy added tothe system, and the total energy of the system is a combination of kinetic andgravitational potential energies.)
- The mass of planet A is 192 times the mass of planet B. The distance between the centres of the two planets is 77 times the radius of planet A : R, = 9193.4 km.Find the centre of mass of the two-planet system. [Recommended time : 10-12 minutes] km 7335.7.a O km 3667.8 .bO km 3686.9 .c O km 22629.9 .d OAt apogee, the center of the moon is 406,395 km from the center of Earth and at perigee, the moon is 357,643 km from the center of Earth. What is the orbital speed of the moon at perigee and at apogee? The mass of Earth is 5.98 x 1024 kg. speed at perigee| km/s speed at apogee m/s eBookIf the mass and radius of Mars are 6.39 × 1023 kg and 3.4 × 106 m, respectively, what is the escape velocity needed for a spaceship of mass 25,000 kg to escape the gravitational potential well of Mars? A) 1,200 m/s B). 8,658 m/s C). 7,270 m/s D). 5,022 m/s