SOLAR SYSTEM

Detailed explanation-1: -The force of gravity accelerates the ball with acceleration ‘g’ in downward direction. Thus, the ball start its motion in the same direction as that of the force of gravity, when dropped from some height.

Detailed explanation-2: -In the case of an inclined plane, a ball rolling down the plane gains speed because of gravity but while rolling up, it loses its speed due to gravity. So, work done against gravity is zero. Hence, there is no role of gravity.

Detailed explanation-3: -Free Fall Speed Without the effects of air resistance, the speed of an object free falling toward Earth would increase by about 32 ft (9.8 m) per second every second.

Detailed explanation-4: -Eventually the air drag and gravitational force have equal magnitudes. The ball then falls at a constant speed-this is called terminal velocity.

Detailed explanation-5: -When something falls, it falls because of gravity. Because that object feels a force, it accelerates, which means its velocity gets bigger and bigger as it falls. The strength with which the Earth pulls on something in the form of gravity is a type of acceleration.