What is the acceleration of a rock at the top of its trajectory when thrown straight upward. explain whether or not the answer is zero by using the equation a = f/m as a guide to your thinking?

Acceleration directed downward

Explanation:

From Newton's second law we know that

so

The force acting on the abject is the gravitational pull of the earth. Which is also called the weight of the object

We know that

So

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!