Physics 011

Quiz#6

 Chapter 6 Practice Problems

 1 Just as a car tops a 40 meter high hill with a speed of - km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill? 2 A pendulum has a mass of 3-kg, a length of 2 meters and swings through a (half)arc of degrees. What is its Amplitude to the nearest centimeter ? 3 A pendulum has a mass of 3-kg, a length of meter, and swings through a (half) arc of 30 degrees. To the tenth of a Joule, what is its maximum Kinetic Energy? 4 A pendulum has a mass of 3-kg, a length of 3 meters and swings through a (half)arc of radians. To the tenth of a Joule, what is its Total Energy? 5 A 2-kg metal plate slides down a 10-meter high slope. At the bottom its speed is m/s. To the nearest Joule, what was the magnitude of the work done by friction? 6 If the slope in the above problem is degrees and the speed at the bottom is 8 m/s, what is the coefficent of friction (to 2 decimal places)? 7 An unstretched spring with spring constant 20 N/cm is suspended from the ceiling. A -kg mass is attached to the spring and let fall. To the nearest tenth of a centimeter, how far does it stretch the spring? 8 An unstretched spring with spring constant N/cm is suspended from the ceiling. A 4-kg mass is attached to the spring and slowly let down. To the nearest tenth of a centimeter, how far does it stretch the spring? 9 A mass of 3 kg is dropped from a height of meters above a vertical spring anchored at its lower end to the floor. If the spring constant is 25 N/cm, how far to the nearest tenth of a cm, is the spring compressed? 10 If the mass in problem 9 is meters above the ground and the top of the spring is 3 meters above the ground when the mass is released, what is its kinetic energy, to the nearest Joule, just before it strikes the spring?