A stone is thrown horizontally from the top of a cliff. Ignoring air resistance, the forces acting on the stone as it falls are: gravity and the original force gravity alone the original force alone cannot be determined

A hockey puck sits at rest on a frictionless surface. The puck is pushed with a particular constant force for 3 seconds and achieves a speed of 5 m/s. In order to achieve a the same speed with a force half as strong as the original one the hockey puck needs to be pushed for O 3 seconds 6 seconds 9 seconds

If no net external force acts on an object which of the following is true Group of answer choices pick one answer only The forces are not equal and opposite It will change speed/velocity It will stop It will not start moving

You are trying to move a light fixture into an apartment. There are hooks in the elevator so you hang the fixture on a hook with a chain. You don't want the fixture to touch the walls, so you attach a rope to the side that pulls horizontally as shown, keeping the fixture stationary with respect to the elevator. Note 0 = 35°. Chain Rope Fixture As the elevator ascends vertically, the magnitude of the tension force in the chain from the elevator on the fixture as a function of the vertical position of the elevator, y, is Fa(y) = Foe y/n where Fo = 108 N and y1 = 6.5 m. Work From Chain Using the fixture as your system, if the elevator goes from y = 0 to y = 5.85 m, what is the work done by the tension force in the chain on the fixture? Reminder About Work ........................................... Make Sure to Integrate! Wef = | Work From Rope The tension force in the horizontal rope as a function of y is Ff(y) = Fje-y/y1 where F = 61 N and y1 = 6.5 m. What is the work done by the…