# College Physics Reasoning and Relationships

Physics & Astronomy

## Quiz 5 :Circular Motion and Gravitation

Showing 1 - 20 of 55
For a point on a spinning disc in uniform circular motion, which of the following is not constant?
Free
Multiple Choice

C

A point on the rim of a 0.30-m radius rotating wheel has a tangential speed of 4.0 m/s. What is the tangential speed of a point 0.10 m from the center of the same wheel?
Free
Multiple Choice

B

The cutting cord on a gas-powered weed cutter is 0.20 m in length. If the motor rotates at the rate of 20 rev/s, what is the tangential speed of the end of the cord?
Free
Multiple Choice

B

A bucket in an old well is hoisted upward by a rope that winds up on a cylinder having a radius of 0.10 m. How many rev/s must the cylinder turn if the bucket is raised at a speed of 0.15 m/s?
Multiple Choice
Calculate the linear speed due to the Earth's rotation for a person at 40° north latitude on the Earth. The radius of the Earth is 6.40 106 m.
Multiple Choice
A ventilation fan has blades 0.50 m long rotating at 20 rpm. What is the centripetal acceleration of a point on the outer tip of a blade?
Multiple Choice
A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 400 N, then what maximum speed can the mass have if the string is not to break?
Multiple Choice
A point on the rim of a 0.25-m radius fan blade has centripetal acceleration of 0.20 m/s2. Find the centripetal acceleration of a point 0.1 m from the center of the same wheel.
Multiple Choice
The distance from the center of a Ferris wheel to a passenger seat is 6.0 m. What centripetal acceleration does a passenger experience when the wheel rotates once every 4 seconds?
Multiple Choice
What centripetal force does an 60-kg passenger experience when seated 12 m from the center of a Ferris wheel that rotates once every 4 seconds?
Multiple Choice
A 1500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 14 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
Multiple Choice
At what angle (relative to the horizontal) should a curve 52 m in radius be banked if no friction is required to prevent the car from slipping when traveling at 10 m/s? (g = 9.8 m/s2)
Multiple Choice
At what speed will a car round a 125 m radius curve, banked at a 45 angle, if no friction is required between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
Multiple Choice
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 acceleration for this point at that moment is:
Multiple Choice
A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?
Multiple Choice
A roller coaster, loaded with passengers, has a mass of 3000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? (g = 9.8 m/s2)
Multiple Choice