What is the final speed (V) of two railroad cars?

A 200-N child stands on a 400-N board, which is supported by two vertical pillars that are 1.6 m apart. What is the force exerted by each pillar?

As shown in the figure, a 10.0 m long bar is attached by a frictionless hinge to a wall and held horizontal by a light rope that makes an angle θ with the bar. The bar is uniform and has a mass of 7 kg. What is the tension (T) in the rope when a 10.0 kg mass be suspended 4.2 cm from the hinge?

An object with a mass of 10 kg is initially at rest at the top of a frictionless inclined plane that rises at 80° above the horizontal. At the top, the object is initially 3.0 m high from the floor, as shown in the figure. When the object is released from this position, it eventually stops at a distance d = 13 m from the bottom of the inclined plane along a horizontal surface, as shown. Air resistance is negligible. Find the frictional coefficient (mu) between the horizontal surface.  Is this friction static or kinetic?

If by “working” we mean that a person loses 5-10% of their starting weight, do diets work?

In the film, “In Defense of Food”, Michael Pollan encourages us to “eat food”.  Which of the following would meet his recommendations for “food”?

Which of the following is a reason that providers may want to better understand the personality of their patient:

You would predict a placebo effect to be enhanced if:

According to the accompanying materials for the film Being Mortal, a recommendation by experts concerning preparation for end of life is to:

Your risk of CVD could be elevated if you: