Question

2) In the drawing above, object A has 10 times the mass of object B. Each object produces gravitational field that exerts a force on the person. The distance between the centers of objects A and B is d. The person is standing a distance of 3/4 d from object A , what is the net gravitational force exerted on the person ( magnitude and direction).

3) Two banked curves have the same radius. Curve A is banked at an angle of 37 degrees, and curve B is banked at 53 degrees. A car can travel around the curve without relying on friction at a speed of 30 m/s. At what speed can this car travel around curve B without relying on friction?

4) The Gravitron is a carnival ride that looks like a large cylinder. People stand inside the cylinder against the wall as it begins to spin. Eventually, it is rotating fast enough that the floor can be removed without anyone falling. Given that the coefficient of friction between a person's clothing and the wall is u , the tangential speed is v, and the radius of the ride is r, what is the greatest mass that a person can be to safely go on this ride?

Answer 1