The two factors affect gravity?Amass and distanceBdistance and powerCwork and speedDdistance and time

To determine which two factors affect gravity, let's break down the options provided.

1. Option A: Mass and Distance

   • This option aligns with the law of universal gravitation proposed by Isaac Newton, which states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This means that as mass increases, gravity increases; and as distance increases, gravity decreases.

2. Option B: Distance and Power

   • Power is not a factor in gravity; it refers to the rate at which work is done or energy is transferred.

3. Option C: Work and Speed

   • Work and speed do not have a direct relationship with the force of gravity. Work involves energy and displacement, while speed refers to the rate of motion.

4. Option D: Distance and Time

   • Time does not affect the gravitational force itself. While gravity influences the motion of objects over time, it is not a direct factor affecting the strength of gravity.

Given this analysis:

Final Answer

The correct factors that affect gravity are Mass and Distance (Option A).