graphicer89
New member
Thanks alot for taking a look at these questions...i have some doubts on how i did this but i just need to reassure my self ...i know its a lot of questions but i would really appreciate at if someone could just explain some of it...thanks
1)The gravitational force exerted by one object on another :
A)is the same size as if each objects mass were located at its respective center of mass
B) is directly proportional to the distance between the 2 objects
C) does not depend upon the masses of the 2 objects
D) causes both objects to accelerate
2)According to newton what effect does earths gravitational field have on the moon? (CHOOSE AS MANY AS APPLY)
A) It acts like a centripetal force on the moon
B) It changes the moons velocity
C) It causes the moon to fall below the straight line it would other wise follow
D) It increases the mass of the moon
3)Which of the following are due to the effects of gravity?(CHOOSE AS MANY AS APPLY)
A)Perturbations in the orbits of the planets
B)The spherical shape of the earth
C)The collapse of massive stars which no longer are undergoing fusion
D)Ocean tides
4) If a planet has a radius 10 times the radius of the earth and five times the mass, what is the value of g on this planet?
A) 9.8 m/sec^2
B) 6.67x10^-11 Nxm^2/kg^2
C) 1/20 of G on earth
D) 20 times the value of g on earth
E) none of these
5) What is the value of G on the planet described on the question above?
A) 9.8 m/sec^2
B) 6.67x10^-11 Nxm^2/kg^2
C) 1/20 of G on earth
D) 20 times the value of G on earth
E) none of these
6) If the mass of a star is 6 x 10^50kg, what would be the mass of the black hole formed if the star collapsed?
A) 6 x 10^50kg
B) 6.67 x 10^-11kg
C) It would depend upon the radius of the black hole
D) 0 kg
7) If the star described in the question above exerted a gravitational force on an orbiting planet of 10^20 N,what gravitational force would it exert on the planet if the star collapsed to form a black hole?
A) 10^20N
B) much greater than 10^20N
C) much less than 10^20 N
D) there is not enough information given to answer this question
1)The gravitational force exerted by one object on another :
A)is the same size as if each objects mass were located at its respective center of mass
B) is directly proportional to the distance between the 2 objects
C) does not depend upon the masses of the 2 objects
D) causes both objects to accelerate
2)According to newton what effect does earths gravitational field have on the moon? (CHOOSE AS MANY AS APPLY)
A) It acts like a centripetal force on the moon
B) It changes the moons velocity
C) It causes the moon to fall below the straight line it would other wise follow
D) It increases the mass of the moon
3)Which of the following are due to the effects of gravity?(CHOOSE AS MANY AS APPLY)
A)Perturbations in the orbits of the planets
B)The spherical shape of the earth
C)The collapse of massive stars which no longer are undergoing fusion
D)Ocean tides
4) If a planet has a radius 10 times the radius of the earth and five times the mass, what is the value of g on this planet?
A) 9.8 m/sec^2
B) 6.67x10^-11 Nxm^2/kg^2
C) 1/20 of G on earth
D) 20 times the value of g on earth
E) none of these
5) What is the value of G on the planet described on the question above?
A) 9.8 m/sec^2
B) 6.67x10^-11 Nxm^2/kg^2
C) 1/20 of G on earth
D) 20 times the value of G on earth
E) none of these
6) If the mass of a star is 6 x 10^50kg, what would be the mass of the black hole formed if the star collapsed?
A) 6 x 10^50kg
B) 6.67 x 10^-11kg
C) It would depend upon the radius of the black hole
D) 0 kg
7) If the star described in the question above exerted a gravitational force on an orbiting planet of 10^20 N,what gravitational force would it exert on the planet if the star collapsed to form a black hole?
A) 10^20N
B) much greater than 10^20N
C) much less than 10^20 N
D) there is not enough information given to answer this question