Physics 011
Quiz#6
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Chapter 6 |
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Practice Problems |
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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? |
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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 ? |
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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? |
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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? |
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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? |
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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)? |
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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? |
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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? |
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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? |
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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? |
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