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 3kg, 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 3kg, 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 3kg, 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 2kg metal plate slides down a 10meter 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 4kg 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? 

