Homework Help: physics

Posted by sara on Saturday, January 5, 2013 at 8:55pm.

Ceres is a dwarf planet located in the asteroid belt between the orbits of mars and Jupiter. the radius of Ceres is 4.76 x 10^5 m. suppose an astronauts stands on the surface of Ceres and drops a 0.85 kg hammer from a height of 1.25 m. the hammer takes 3.0 to reach the ground.
a) determine the gravitational field strength of Ceres at this height.(ans 0.28 n/kg)
b) determine the mass of Ceres. (ans 9.4 x 10^20 kg)
c) determine the gravitational field strength of Ceres at an altitude of 150 km above its surface. (ans 0.16 N/kg)

physics - drwls, Sunday, January 6, 2013 at 5:26am
a). The effective acceleration of gravity, g', is given by
(1/2)g'*t^2 = 1.25 m
g' = 2.5/9 = 0.28 m/s^2. (or N/kg)

b) G M/R^2 = 0.28 N/kg
G is the universal gravity constant. Look it up and solve for asteroid mass M.

c) g' falls inversely with the square of the distance from the center. Multiply the surface value, 0.28 N/kg, by (476 km/626 km)^2

Answer this Question

Related Questions

Physics - The asteroid belt circles the sun between the orbits of Mars and ...
help help help - The asteroid belt between Mars and Jupiter consists of many ...
physics - Evidence suggests that there are trillions of dollars' worth of ...
Science - What objects are located between the orbits of Mars And Jupiter? :I
Science - What object(s) are located between the orbits of Mars and Jupiter
physics - The region of the solar system between Mars and Jupiter contains many ...
Physics - The region of the solar system between Mars and Jupiter contains many...
Physics 1 - The region of the solar system between Mars and Jupiter contains ...
Physics 1 - The region of the solar system between Mars and Jupiter contains ...
Physics - The region of the solar system between Mars and Jupiter contains many ...

For Further Reading

First Name:
School Subject:
Answer: