Physics Gravitation Level: Misc Level
You are on an airplane traveling with a constant velocity at an altitude of20,000 m. What is the acceleration of gravity at that altitude?The radius of Earth is 6.37x10 to power of (6) m.
a. 9.81 m/s squared
b.9.78 m/s squared
c.9.75 m/s squared
d.9.72 m/s squared
Physics Gravitation Level: Misc Level
What would be the weight of a 59.1-kg astronaut on a planet with the same density as Earth and having twice Earth,s radius?
a.580 N
b.290N
c.1160 N
d.2320 N
Physics Gravitation Level: Misc Level
What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth,s radius?
a.580 N
b. 290 N
c. 1160 N
d.118 N
Physics Gravitation Level: Misc Level
An astronaut is in a capsule in a stable orbit, about two Earth radii from the center of Earth. Her weight is;
a. Zero N.
b.The same as on the surface of Earth.
c. About one-half of her weight on the surface of Earth.
d. About one-quarter of her weight on the surface of Earth.
Physics Gravitation Level: Misc Level
A system consists of three particles, each of mass 4.00 g, located at the corners of an equilateral triangle with sides of 31.0 cm
(a) Calculate the potential energy of the system. (Assume that U=0 as r---00.)J
(b) If the particles are released simultaneously, where will they collide?
1. at an edge
2. at the center
3. will never collide
4. at a corner
Physics Gravitation Level: Misc Level
A synchronous satellite, which always remains above the same point on a planet,s equator, is put in orbit around Saturn so that scientists can study a surface feature. Saturn rotates once every 10.5 h. Use the data of Table 13.2 to find the alittude of the satellite.
Physics Gravitation Level: Misc Level
Three uniform spheres of mass m1=1.50 kg, 4.00 kg, and m2=6.50 kg are placed at the corners of a right triangle as in Figure P 13.5. Calculate the resultant gravitational force on the 4.00 kg object, assuming the spheres are isolated from the rest of the Universe. iN+ jN
Physics Gravitation Level: Misc Level
Gold has a density of 19.3 x 10^3 kg /m^3. What would be the radius of a solid gold sphere if the acceleration due to gravity at its surface is to be 9.81 m/s^2? Remember, G=6.67x 10^-11 N-m^2 /kg ^2 and V=4/3 (pi)r^3.
Physics Gravitation Level: Misc Level
if two planets have the same, but the second has twice the gravity, the second planet must also have half the radius.
-true- false
Physics Gravitation Level: Misc Level
Consider two planets orbiting a star. If one planet has eight times the period of another, it must also have four times the average orbital distance.
-true- false
Physics Gravitation Level: Misc Level
What is the period of revolution of a 100 kg satelitte that is orbiting at a distance of 7.50x10 to the eight m from the center of the Earth?
Physics Gravitation Level: Misc Level
What is the speed of a 200 kg geosynchronous satellite that is orbiting 300 km above the Earth,s surface?
Physics Gravitation Level: Misc Level
A gravitational force of 1.50x10 to the negative seven N exists between two masses that are 2.0 m.If on mass is twice that of the other mass, what are two masses?
Physics Gravitation Level: Misc Level
Two students are sitting 1.5m apart. One student has a mass of 70.0 kg and the other has a mass of 52.0 kg. What is the gravitational force between them?
Physics Gravitation Level: Misc Level
Knowing that the Earth,s orbital radius is 1.49x10 to the 11th m and its period of revolution around the Sun is 1.00 years, calculate the period of revolution of the planet Mercury whose orbital radius is 5.79x10 to the10 th m. (Kepler,s law of periods formula)
