find formula for viscous force (F) acting on a sphere of radius (R) falling with velocity(V) through a medium of coetticient of viscosity​

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

Blank liquids and gases exert a buoyant force on objects placed in them

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)