An astronaut a long way from Earth takes a 500 g mass attaches a 1.5 m string to it and spins it around his head at a rate of 2 times a second. A. What is the speed of the mass?

B. What is the tension in the string?

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship's kinetic energy at this time? (b) how much work is required to stop it? (give the work done on the ship. include the sign of the value in your answer.) (c) what is the magnitude of the constant force required to stop it as it undergoes a displacement of 3.00 km?