Quiz - APP1 Circular Motion 2

A pilot experiences centripetal acceleration of 2g's (2 x 9.8 m/s²) while maneuvering a loop at a speed of 400 m/s. What is the radius of the loop?

• 203 m

• 8163 m

• 80,003 m

• 23 m

Consider a point on a bicycle tire that is momentarily in contact with the ground as the bicycle rolls across the ground with constant speed. The direction for the centripetal acceleration for this point at that moment is

• upward

• down toward the ground

• forward

• at that moment the acceleration is zero

A roller coaster has two loops of different radii.  Which will have the greater centripetal force?

• loop with greater radius

• loop with smaller radius

• both have the same

• not enough information

The Gemini roller coaster has two cars of differing mass.  Which will have a greater centripetal force at the bottom of the first hill?

• The car with more mass

• The car with less mass

• Both are the same

• Not enough information

A roller coaster has two loops of different radii.  What forces provide the centripetal force at the top of the loop?

• Normal force

• Gravitational force

• Normal Force - Gravitational Force

• Normal Force + Gravitational Force

You travel to another planet that has twice the radius of the Earth but the same mass. Compared to your weight on Earth, your weight will

• Double

• Be cut in half

• Be 1/4 your weight on Earth

• The Same

On vacation, you go to the Grand Canyon and walk down to the bottom of the canyon.  During this walk what happened to your weight?

• Weight increased

• weight decreased

• No change

• Not enough information

How is gravitational force proportional to the mass of two objects?

• Directly

• Inversely

• No Correlation

How is gravitational force proportional to the distance of two objects?

• Directly

• Inversely

• No Correlation

A lane on the highway is curving and you feel forced towards the outside of the curve as you drive.  The most direct cause of this is:

• Normal Force

• Centripetal Force

• Inertia

• Gravitational Force