0.095kg is going in a circle on a horizontal frictionless surface. It is held in its orbit by 0.65 s (10%) Problem 1: A puck of mass m = massless string of length L 0.85 m. The puck makes one revolution every t 50% Part (a) What the magnitude of the tension in the string, F, in Newtons, while it spins? 50% Part (b) The string breaks suddenly. How fast does the puck move away, v in m/s?

Why is there friction between objects

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

What determines the amount of inertia an object has