Question 3. please answer these

The gravitational force between two objects is 1600 and what will be the gravitational force between the objects if the distance between them doubles?

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little