What is the weight of a 68-kg astronaut (a) on Earth (b) on the Moon (g=1.7 m/s^2) (c) on mars (g=3.7 m/s^2) (d) in outer space traveling

Two books are on a shelf 1.3 m from one another. Book A has a mass of 2.2 kg. Book B hasa mass of 1.7 kg. An absentminded student picks up book A to see if it is useful for his re-search paper. He decides not to use the book and sets it on a shelf 1.8 m from book B.What effect does this have on the gravitational force between the books?AThe gravitational force remains the same because the masses of the books remainconstant.BThe gravitational force decreases because the distance between the books increases.The gravitational force increases because the distance between the books increases.DThe gravitational force remains the same because distance does not affect gravity for small objects

You encounter a strange cosmic string in outer space.  The string extends along the x axis from x = 0 m to x = 4.6 x 104 m.  You are located at x = -5.4 x 104 m.  You experience a gravitational field equal to 9.6 x 10-6 N/kg at this location.  Assuming the string has a constant linear mass density, calculate this linear mass density, in units of 105kg/m.  Use G = 6.7 x 10-11 N m2/ kg2. (Please answer to the fourth decimal place - i.e 14.3225)

The values of gravitational acceleration at the surfaces of Jupiter, Pluto, and the sun are 23.12 m/s, 0.72 m/s, and 273.98 m/s, respectively. Determine your weight at each of these locations in both SI and US customary units. Assume no loss of mass results from the extreme conditions.

At what height (in km) above the surface of Earth would the- gravitational acceleration be 2.2 m/s2?

B) what is the period of the orbit, in hours?

Find the distance of a point from the earth's center where the resultant gravitational field due to the earth and the moon is zero. The mass of the earth is 6 * 0 * 10 ^ 24 kg and that of the moon is 7*4*10^ 22 kg. The distance between the earth and the moon is 4*0*10^ 5 km.

An artificial satellite is "parked" in an equatorial circular orbit at an altitude of 103 km above the surface of the Earth.  a) What is the speed of the satellite? b) What is the minimum additional velocity that must be imparted to the satellite if it is to escape from Earth's gravitational attraction?   G = 6.67 x 10-11*N*m2/kg2  ME = 6.0 x 1024 kg RE = 6.4 x 106 m

1) What is the speed of the satellite in m/s?

After consuming all of its nuclear fuel, a massive star can collapse to form a black hole, which is an immensely dense object whose escape speed is greater than the speed of light. Newton's law of universal gravitation still describes the froce that a black hole exerts on objects outside it. A spacecraft in the shape of a long cylinder has a length of 100m, and its mass with occupants is 1000kg. It has strayed too close to a black hole having a mass 100 times that of the sun. If the nose of the spacecraft points toward the center of the black hole, and if the distance between the nose of the spacecraft and the black hole's center is 10km (a) determine the total force on the spacecraft. (b) What is the difference in the force per kilogram of mass felt by the occupants in the nose of the ship versus those in the rear of the ship farthest from the black hole?