Sam wants to know how fast his brother can run. He knows the time it took for his brother to run from the starting line to the finish line. What else does he need to know in order to calculate the

speed of his brother?

O He needs to know what time his brother ate lunch.

O He needs to know the direction his brother ran.

O He needs to know the distance from the starting line to the finish line.

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.