Lucile throws a water balloon off of the edge of a building. She throws it downward with a speed of 4.1 m/s. After 1.5 seconds, what is the balloon’s velocity?

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

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

12. ritu obtained a distinct image of a distant tree on the screen with the of a concave mirror.to find the focal length of the mirror she has to measure the distance between: (a) mirror and the tree. (b) screen and the tree.(c) mirror and the screen. (d) mirror and tree as well as between screen and the tree.