Physics Circular Motion Level: Misc Level
During the time a compact disc ( C D) accelerates from resst to a constant rotational speed of 477 rev /min, it rotates through an angular displacement of 0.250 rev. What is the angular acceleration of the CD?
Physics Circular Motion Level: Misc Level
A child on a swing has a speed of 6.9 m /s at the lowest point of the arc. How high will the swing be at the high point (taking the lowest point as height zero )?
Physics Circular Motion Level: Misc Level
A torque of 12 N m is applied to a solid, uniform disk of radius 0.50 m. If the disk accelerates at 5.0 rad / s ^2, what is the mass of the disk ?
Physics Circular Motion Level: Misc Level
The crankshaft of an engine is accelerated from rest at the uniform rate of 4.0 rad /s 2 for 30 s. Find the rotational speed of the crankshaft at the end of 30 in rev /min.
Physics Circular Motion Level: Misc Level
A solid cylinder of mass 8 kg and diameter 20 cm is rotated about an axis parallel to its central axis at a distance of 10 cm from the cylinder. The rotational inertia of the cylinder about the parallel axis is:
Physics Circular Motion Level: Misc Level
An angular acceleration of 1200 rev /min 2 when expressed in radians /s 2 is:
Physics Circular Motion Level: Misc Level
A bug slowly moves radically outward on a spinning 45 rpm record. How do its angular speed and tangential speed change as it moves to larger radii?
Physics Circular Motion Level: Misc Level
A bike wheel has a diameter of 0. 80 m and a mass of 2. 0 kg.
(a) If the bike travels with a linear speed of 1.5 m/s, what is the angular speed of the wheel?
(b) What is the angular momentum of the wheel? (Consider the wheel to be a thin ring.)
Physics Circular Motion Level: Misc Level
A bicycle is moving 4. 0 m /s. What is the angular speed of a wheel if its radius is 30 cm?
Physics Circular Motion Level: Misc Level
Gary recently rode his Harley (total mass of 500 kg) through the Tail of the Dragon at Deals Gap in the Great Smoky Mountains, In general the radius of each of the 318 curves averaged 29 ft.
a. If he takes the curves at the posted speed limit (30 mph) , what is his centripetal acceleration?
b.At that speed , what centripetal force is acting on him and his bike?
Physics Circular Motion Level: Misc Level
A ball is whirled on the end of a string in a horizontal circle at constant speed. Suddenly, the string breaks, lmmediately after the strings breaks, the bal will?
Physics Circular Motion Level: Misc Level
If a car goes around a curve too fast, it tends to slide out of the curve since the frictional force is not large enough to provide the necessary centripetal force . one way to get around this is to create a banked curve in which a centripetal force is present even in the absence of friction, as shown below . the vertical component of the normal force N equals mg, and the horizontal component of the normal force provides the centripetal force .
(a) Calculate an expression for the maximum speed a car can maintain around a curve of radius R banked at angle ? E valuate it for R=200 m and ? =10%
Physics Circular Motion Level: Misc Level
A race car starts from rest on a circular track of radius 400 m. The cars speed increases at a constant rate of. 5 m/s ^2. At the point where the magnitudes of the centripital and tangential accelerations are equal,determine the speed of the car.the distance traveled, the elapsed time.
Physics Circular Motion Level: Misc Level
A rotaing wheel requires 3 sec to rotate 37 revolutions. Its angular velocity at the end of the three second interval is 98 rad/sec. what is the constant angular acceleration of the wheel?
Physics Circular Motion Level: Misc Level
The tub of a washer starts from rest and reaches an angular speed of 5 rev/sec in 8 sec. A person then stops the washer and the tub goes to rest in 12 sec. How many revolutions does the tub make during the 20 sec interval.
