A ball is thrown straight upward with a velocity and in a time reaches the top of its flight path, which is a displacement above the launch point. With a launch velocity of , what would be the time required to reach the top of its flight path and what would be the displacement of the top point above the launch point

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.