Answer:
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
All of the potential energy has changed and is being used in a different form. For example all of the potential energy could’ve change to kinetic energy. :)
Answer:
Explanation:
For this problem, we need to make use of Newton's law of universal gravitation. This law states that two objects attract each other with a force that is inversely proportional to the square of the distance of their centers of mass and directly proportional to the product of their masses. We can write this as:
where F is the attractive force, G is the gravitational constant, r is the distance between their centers of mass, and M and m are the masses of the objects.
From here we will let M be the mass of the earth, and m the mass columbia. From Newton's second law, we know that the gravitational force exerted to columbia due to the earth can be written as
,
here, making a substitution we get
The distance between columbia and the earth's center is
.
Now, computing the acceleration: