What is the force of gravity between earth (6.0 × 1024 kilograms) and venus (4.88 × 1024 kilograms)? the distance between the two planets is about 3.8 × 1010 meters. (the value of g is 6.673 × 10-11 newton meter2/kilogram2. the mass of earth is 5.98 × 1024 kilograms.) a. 13.52 newtons b. 51.39 newtons c. 13.52 x 10^17 newtons d. 51.39 x 10^17 newtons

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm