4. You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy tourist guidebook you find that
the height of the Eiffel Tower is 324 m. If you neglect air resistance, calculate how many
seconds the croissant dropped from the top of the tower before it tagged you on the head.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?