1. A plane travelling in horizontal circular motion makes a complete lap in 2.00 minutes. a) If the speed of the plane is 170 m/s, what is the radius of the circular path? (b) what would be the plane's centripetal acceleration?

2. A 10.0 kg block is attached to a rope that swings vertically on a 2 m rope with a linear speed of 20 m/s? a) What would be the tension in the rope at the top and the bottom of the swing if it were whirled in a vertical circle? (b) How would the previous answers change if the block was traveling at 35 m/s?

3. A 3 kg object is located at a distance of 6.4 x10^6 m from the center of a larger object whose mass is 6.0 x 10^24kg. a) What is the acceleration of the smaller object when it is released? (b) What is the larger object's acceleration to the smaller one? (c) What is the force of gravity between the two masses?