Rotational Motion Review

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 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 The Gemini roller coaster has two cars of differing mass. Which will have a greater centripetal force at the bottom of the first hill? Car with more mass Car with less mass Both have the same not enough information

A roller coaster has two loops of different radii 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 Gravitational Force – Normal Force Frictional Force

In a looped roller coaster, what force(s) provide the centripetal force at the top of the loop at the minimum speed needed to get over the loop? Normal force only Gravitational force only Normal Force + Gravitational Force Normal Force - Gravitational Force Gravitational Force – Normal Force Frictional Force

A roller coaster has two loops of different radii A roller coaster has two loops of different radii. What forces provide the centripetal force at the bottom of the loop? Normal force Gravitational force Normal Force + Gravitational Force Normal Force - Gravitational Force Gravitational Force – Normal Force Frictional Force

A roller coaster has two loops of different radii A roller coaster has two loops of different radii. What forces provide the centripetal force directly to the left of the loop? Normal force Gravitational force Normal Force + Gravitational Force Normal Force - Gravitational Force Gravitational Force – Normal Force Frictional Force

What gives the centripetal force that allows a motorcycle to drive around the inside of a cage? Frictional Gravitational Normal Tensional Applied

What gives the centripetal force that keeps the moon revolving around the Earth? Frictional Gravitational Normal Tensional Applied

Two adjacent lanes are curving Two adjacent lanes are curving. If the lanes are flat, what provides the centripetal force? Normal force Gravitational force Normal Force + Gravitational Force Frictional Force

Two adjacent lanes are curving Two adjacent lanes are curving. Which lane should you choose if you want to minimize the centripetal force? inner lane outer lane both have same force unable to be determined

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 Gravitational force Inertia Centrifugal force Centripetal force

How is gravitational force proportional to the distance between two objects? Directly Inversely No Correlation

How is gravitational force proportional to the mass of two objects? Directly Inversely No Correlation

How is gravitational force proportional to the volume of two objects? Directly Inversely No Correlation

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

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 ¼ your weight on Earth The same

Which will produce the most torque? 5N force exerted .2m from the axis 10N force exerted .2m from the axis 20N force exerted .01m from the axis 5N force exerted .3m from the axis

What is a way to increase the torque on an object? Exert more force. Exert the same force at a greater distance from the fulcrum. Exert a lesser force closer to the fulcrum. Both 1 and 2 are correct All of the above

Which of the following produces positive torque on a lever? A parallel force 20cm from the axis A perpendicular force upward 20cm to the right of the axis A perpendicular force upward 20cm to the left of the axis A perpendicular force downward 20cm to the right of the axis

The average position of an object’s weight is the Fulcrum Center of mass Gravitational Force Lever Axis of rotation Answer Now

An object in rotational equilibrium has No torque applied A constant tangential speed A net torque of zero An axis of rotation Answer Now