Review: Ch 7 Circular Motion Quiz

445 degrees is how many radians

• 80100 pi

• 7.7 pi

• 2.47 pi

• 25497 pi

When the small gear turns as shown, does the speed of the larger gear increase, decrease, remain constant, or is it none of the above?

• decrease

• increase

• constant

• none of the above

Tags

NGSS.MS-PS3-1

What is an example of a 2nd class lever?

• classroom door

• tweezers

• scissors

• broom

Compare the Moment of Inertia (I) of the Red hollow sphere to Gold solid sphere to the Green hollow cylinder to the Blue solid cylinder from greatest resistance to angular acceleration to least resistance...

• A

  Igold>Igreen>Ired>Iblue

• B

  Ired>Igold>Igreen>Iblue

• C

  Igreen<Ired<Iblue<Igold

• D

  Igreen>Ired>Iblue>Igold

Tags

NGSS.MS-PS2-2

Each planet travels in an elliptical orbit around the sun, and the sun is at one of the focal points is Kepler's ___ Law?

• Second
• First

• Fourth

• Third

Tags

NGSS.MS-ESS1-2

The square of a planet's orbital period (T2) is proportional to the cube of the average distance (r3) between the planet and the sun allows orbital period to be found as a ratio far and near points in our planet's orbit around the son is Kepler's ___ Law?

• 3rd
• 2nd

• 1st

• 4th

Which of the following corresponds to the order in which the formulas for orbital period (T) and orbital speed (v) are derived in the diagram?

• 1st

• 2nd

• 3rd

• none of the above

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-1

A race car moving along a circular track has a centripetal acceleration of 25 m/s². If the car has a tangential speed of 60.0 m/s, what is the distance between the car and the center of the track?

• A

  10.4 m

• B

  58.4 m

• C

  144 m

• D

  88.6 m

Tags

NGSS.MS-PS2-2

Predict the magnitude of the gravitational force a 77 kg walrus would experience while standing .009 km away from a .9 kg penguin?

• A

  5.13x10^(-10) N

• B

  5.7x10^(-5) N

• C

  5.7x10^(-11) N

• D

  3.5x10^(-10) N

Tags

NGSS.MS-PS2-4

8.9 rad/sec is how many revolutions per minute (when 60sec/1min)?

• A

  84.98 rpm

• B

  .93 rpm

• C

  .024 rpm

• D

  839 rpm