An astronaut has a weight of 500 N on the Earth. They then travel to a new planet which has twice the mass of the Earth and twice the radius of the Earth. The weight of the astronaut on this new planet would be a. 500 N ь. 2000 N O c. 250 N d. 125 N O e. 1000 N

10). Two spheres are placed 2m apart. They are fixed in place so that they cannot move. Someone takes a third object and slowly move it into place near them, as shown in the figure. M1 = 500 kg, M2 = 200 kg, and M3 = 100 kg.a). What speed would the third sphere (M3) need to be given to escape from the gravitational effects of the other two spheres?b). Once the third object is in place, what is the net force (magnitude and direction) on the third object?

plz all 3

4. A Ferris wheel has a radius of 9.00 m and is set so that its passengers move at 3.00 m/s. The mass of a passenger is 60 kg. a. What is the passenger's normal force when the Ferris wheel is at the bottom of its path? b. What is the force factor at the bottom? c. What is the passenger's normal force at the top? d. What is the force factor at the top?